Marian Coffin at 150: Celebrating the Legacy of a Pioneer in Landscape Architecture
Jump to: Registration | Sponsorships | Event Details | Getting Here/Being Here | Featured Speakers | Student Exhibition | Hosted By...
Marian Coffin at 150
Celebrating the Legacy of a Pioneer in Landscape Architecture
September 24–25, 2026
Winterthur Museum, Garden & Library and the University of Delaware
If you have any questions, would like to get involved, or are interested in sponsorship opportunities for the event, please reach out to Anna Wik, RLA, Associate Professor of Landscape Architecture, Department of Plant and Soil Sciences, University of Delaware.
Choose a sponsorship level that fits your goals—from accessible student support to premier leadership.
Highlights range from program recognition and helping expand student access, to top-billing as a lead sponsor with prominent branding, event mentions, featured support of key moments (reception, meals, speakers), and included tickets and registrations.
Student Call for Entries to Juried Exhibition
Do you have an original piece that responds to Coffin's legacy?
Submit to a juried exhibition for a cash prize, recognition, and visibility.
Work can be from a previous course or effort.
Fall 2026 marks the 150th birthday of Marian Coffin (September 16, 1876 - January 2, 1957), the pioneering woman of landscape architecture who designed the landscapes of the UD Green, the gardens of Gibraltar, Winterthur, and Mt. Cuba, and many others in the Delaware Valley and beyond.
This also marks the 10-year anniversary of the launch of the UD Bachelor of Landscape Architecture program in the Department of Plant and Soil Sciences in the College of Agriculture and Natural Resources.
To celebrate these milestones, the UD Bachelor of Landscape Architecture program has teamed up with Preservation Delaware, the non-profit that oversees the Coffin Garden at Gibraltar, the Winterthur Museum, House, and Gardens, and Mt Cuba Center, to develop a two-day symposium bringing awareness to the remarkable achievements of Coffin, and her influence on landscapes and relevance of the field of landscape architecture and historic garden and landscape preservation today.
Overview
Day one of the event will include a history of Coffin’s relationship with the DuPont family, tours of the landscapes of northern Delaware that Coffin designed, and an in-depth visit to the Winterthur archives, which houses Coffin’s decades long correspondence with Henry Francis DuPont. The day will culminate with a visit to the Winterthur exhibition ‘At Home at Winterthur’ in the Winterthur gallery, followed by an optional reception on the terrace.
Day two of the event will take place at University of Delaware, and will include an exciting group of speakers, including experts on Coffin’s legacy and representatives from Coffin landscapes from Kentucky to New York, a tour of UD’s Campus, a keynote by Dr. Sonja Dümpelmann on the role of women in public space design in the early 20th century,a panel of experts on stewarding historic landscapes, and a student exhibition. The day will conclude with a discussion of the new Townsend East Lawn and Garden project and the changing face of the role of landscape architecture in educational spaces, followed by ice cream from UDairy in the University of Delaware Botanic Garden.
Symposium Highlights
- Keynote and invited speakers
- Guided tours of Marian Coffin–designed landscapes
- Student exhibition
- Site-based discussions
- Breakfast and lunch
- Optional terrace reception
- Continuing Education credits for landscape architects (LACES)
- Awaiting approval: Final number of CEUs pending.
Full Schedule
Day One: Thursday, September 24, 2026 | Winterthur
| Time | Event | Location | Speaker |
|---|---|---|---|
| 8:00–9:00 a.m. | Registration | Welcome Center | |
| 9:00–9:15 a.m. | Welcome | Copeland Hall | |
| 9:15–10:00 a.m. | Marian Coffin at Winterthur and Beyond | Copeland Hall | Eileen Scheck |
| 10:00 a.m.–12:30 p.m. | Tour: Group One – Winterthur Group Two – Mt. Cuba & Gibraltar (10:15–11:15 a.m. Gibraltar; 11:30 a.m.–12:30 p.m. Mt. Cuba) | Various | |
| 12:30–1:30 p.m. | Lunch | Copeland Hall | |
| 1:30–4:00 p.m. | Tour: Group Two – Winterthur Group One – Mt. Cuba & Gibraltar (1:30–2:45 p.m. Gibraltar; 3:00–4:00 p.m. Mt. Cuba) | Various | |
| 4:15–5:00 p.m. | Winterthur at Home Exhibition | Winterthur Gallery | |
| 5:00–7:00 p.m. | Reception | Icewell Terrace |
Day Two: Friday, September 25, 2026 | University of Delaware
| Time | Event | Location | Speaker |
|---|---|---|---|
| 8:00–9:00 a.m. | Registration | Townsend Hall Commons | |
| 9:00–9:15 a.m. | Welcome | - | Brian Farkas, Dean, College of Agriculture and Natural Resources, University of Delaware |
| 9:15–9:55 a.m. | Marion Coffin's Legacy | - | Iris Gestram, Landscape Historian |
| 10:05–10:25 a.m. | Coffin's Legacy at UD | - | Jules Bruck, Dean, College of Environmental Design, University of Georgia (Founding Director of UD Bachelor of Landscape Architecture Program) |
| 10:25–10:30 a.m. | Introduction to Coffin Tour / Logistics | - | Josh Twardowski, Director of Landscape Services |
| 10:30–10:45 a.m. | Transport to Main Campus | ||
| 10:45–11:45 a.m. | Tour of Main Campus – Old College District and the Green | Main Campus | |
| 11:45 a.m.–12:45 p.m. | Lunch and Student Exhibition | Trabant Student Center | |
| 12:45–1:45 p.m. | Streets of Philadelphia: Window Gardening and Civil Rights in the Twentieth Century (Keynote) | - | Sonja Dümpelmann |
| 1:45–2:15 p.m. | Return to Townsend Hall | ||
| 2:15–2:25 p.m. | Coffee Break | Townsend Hall Atrium | |
| 2:25–2:50 p.m. | Oxmoor Farm | - | Shirley Harmon |
| 2:50–3:15 p.m. | Fort Ticonderoga | - | Stuart Lilie |
| 3:15–4:00 p.m. | Panel of Stewards | - | Liz Allen, Gibraltar; Josh Twardowski, University of Delaware; Carol Long, Winterthur; Stuart Lilie, Fort Ticonderoga; George Coombs, Mt. Cuba Center; Shirley Harmon, Oxmoor Farm |
| 4:00–5:00 p.m. | Talk and Tour of Townsend East Lawn and Garden | University of Delaware Botanic Gardens | Lauren Kope, UDBG Director; Rosa Mannion, NV5 |
| 5:00–6:00 p.m. | UDairy Ice Cream and Recognition of Student Exhibition Award Members | University of Delaware Botanic Gardens |
Getting here
Nearby major airports include...
You have to major options for train and bus access to and from Newark, DE.
- Newark Regional Transportation Center offers intermittent Amtrak and SEPTA (Southeastern Pennsylvania Transportation Authority) services straight into Newark, Delaware—though not as regularly as the busier Wilmington Station listed below. This station is within walking distance to UD's College of Agriculture and Natural Resources campus.
- Wilmington Station (Joseph R. Biden, Jr., Railroad Station) offers regular Amtrak and SEPTA (Southeastern Pennsylvania Transportation Authority) services to nearby Wilmington, Delaware.
You have to major options for train and bus access to and from Newark, DE.
- Newark Regional Transportation Center offers intermittent Greyhound/ FlixBus services straight into Newark, Delaware—though not as regularly as the busier Wilmington Station listed below. This station is within walking distance to UD's College of Agriculture and Natural Resources campus.
- Wilmington Station (Joseph R. Biden, Jr., Railroad Station) offers regular Greyhound/ FlixBus services to nearby Wilmington, Delaware.
Being here
Hotel block information
- We have reserved a block of rooms at the UD Marriott.
- Other local hotel options will be listed here shortly
UD South Campus
Parking will be available at the University of Delaware's south campus (details coming soon), with bus transportation provided to and from locations on the agenda. Attendees who do not require accessible access should use the provided bus transportation, as parking is limited at Mount Cuba and the Marian Coffin Gardens at Gibraltar.
Winterthur
Parking details coming soon.
Accessibility
Buses being used at the symposium for tours are not wheelchair accessible. Please refer to our Accessibility section for more information.
Buses being used at the symposium for tours are not wheelchair accessible. We encourage only those who need accessible transportation to join us using your own vehicle.
We are unable to provide wheelchair accessible transportation, though portions of the garden tours will be accessible, as described below.
- Winterthur: The Reflecting Pool area is not wheelchair accessible.
- Gibraltar: The Marian Coffin Gardens at Gibraltar feature historic pathways and varied terrain that are not fully accessible in all areas. Walkways include flagstone, crushed stone, dirt paths, steps, and some uneven surfaces with exposed roots. Railings and alternate paths are available in some areas, and seating is located throughout the garden for resting as needed.
- Mt Cuba: Mt. Cuba Center is the former private estate of Pamela and Lammot du Pont Copeland. Because it started as a private residence, some paths are uneven, narrow, or steep.
Featured Speakers
Liz Allen
Garden Manager and Horticulturalist,
Marian Coffin Gardens at Gibraltar
Liz Allen is the Garden Manager and Horticulturist at the Marian Coffin Gardens at Gibraltar in Wilmington, Delaware, where she oversees restoration, stewardship, volunteer engagement, public programming, social media, and fundraising initiatives. She holds a B.A. in Anthropology and an M.A. in Teaching English as a Second Language (TESOL) from the University of Delaware and taught ESL for ten years before founding an ecological landscaping business. Liz has taught courses and led educational programs for the University of Delaware's Osher Lifelong Learning Institutes (OLLI) program and Mt. Cuba Center. Her work focuses on historic garden preservation, ecological horticulture, community engagement, and grant-supported restoration projects.
The Marian Coffin Gardens at Gibraltar are among the earliest surviving commissions of pioneering landscape architect Marian Coffin. This presentation explores the recent revitalization of the gardens and the realities of stewarding a historic landscape in the 21st century. Using photographs, project case studies, and firsthand experiences from the garden's revival, attendees will learn how preservation goals are balanced with ecological considerations, volunteer engagement, fundraising, and public access. The session highlights how Gibraltar continues to honor Coffin's legacy while adapting to changing needs and conditions.
Jules Bruck
Dr. Jules Bruck, FASLA, PLA,
University of Georgia
Dr. Jules Bruck, FASLA, PLA, is Dean of the College of Environment and Design at the University of Georgia. A registered landscape architect, educator, and academic leader, she has built nationally recognized programs that advance design excellence, interdisciplinary collaboration, and student success. Prior to joining UGA, she served as Director of the School of Landscape Architecture and Planning at the University of Florida and was Founding Director of the University of Delaware Landscape Architecture Program, where she launched the award-winning Coastal Resilience Design Studio.
Her work integrates landscape architecture, planting design, ecological design, and nature-based infrastructure to address complex environmental challenges through research, practice, and education. Dr. Bruck is co-author, with Erin Fogarty, of Marian Coffin Gardens at Gibraltar, which highlights her legacy. Dr. Bruck was elected to the Council of Fellows of the American Society of Landscape Architects in 2024.
Marian Coffin's influence on the University of Delaware extends far beyond her design of the historic campus landscape. This presentation explores Coffin's vision for the University of Delaware campus, how her work continues to shape the university's identity and sense of place, and how her legacy has inspired a new generation of landscape architects through the university's landscape architecture program. Reflecting on the program's first ten years, the presentation considers how thoughtful design and the lasting impact of educating future practitioners.
George Coombs
Director of Horticulture,
Mt. Cuba Center
George Coombs is the director of horticulture at Mt. Cuba Center, where he guides the care and development of one of the preeminent native plant gardens in America. To date, his efforts have focused on making Mt. Cuba’s gardens more accessible to a growing number of guests and ensuring the long-term resilience of the garden. Prior to his current role, George managed Mt. Cuba’s trial program, publishing several research reports and helped bring new cultivars of native plants to market.
Mt. Cuba has implemented thoughtful enhancements to a historic garden to enhance accessibility. The major themes discussed will include design, construction management, plant selection, and accessibility features.
Sonja Dumpelmann
Chair of Environmental Humanities,
Ludwig Maximilan University of Munich
Sonja Dümpelmann is Professor and Chair of Environmental Humanities at Ludwig Maximilian University of Munich and a historian of landscapes and the built environment. She was previously a Professor in the Department of Landscape Architecture at the University of Pennsylvania Stuart Weitzman School of Design and taught for almost 20 years in the United States. Her most recent books are Landscapes for Sport: Histories of Physical Exercise, Sport, and Health (ed., 2022) and Seeing Trees: A History of Street Trees in New York City and Berlin (2019).
Public space gardening campaigns undertaken by female reformers and activists between the 1870s and 1970s included window gardening. First embraced as a tool of Progressive reform and social charity, window gardening was later revived as a form of grassroots activism in response to urban decay, racism, and public disinvestment. Philadelphia’s efforts became a model for the nation and beyond, believed to ease social tensions and inspire neighborhood renewal. This lecture examines how window-box activism connected ideas of femaleness, morality, nature, and beauty, forging relationships between people and plants, indoor and outdoor spaces, and the domestic and public realms. It also considers how these small acts of beautification could catalyze neighborhood change while simultaneously masking larger social problems that required political solutions.
Linda Eirhart
Director of Garden,
Winterthur Museum, Garden and Library
Stuart Lilie graduated from the College of William and Mary. He worked for Colonial Williamsburg and began his own historic saddlery company. Since 20111, Stuart has led the Public History department at Fort Ticonderoga, which reaches nearly 70,000 visitors annually through daily programs and events. He oversees all aspects of the visitor experience, including living history programs and events, historic trades, heritage breeds, horticulture, museum education, school outreach, and maritime programs. Stuart Lilie leads the cultivation and interpretation of Marian Coffin's 1920 King's Garden at Fort Ticonderoga.
Join Fort Ticonderoga's Vice President of Public History, Stuart Lilie, to explore the 1920 plan of the King's Garden at Fort Ticonderoga. Examine how Marian Cruger Coffin reshaped this garden using existing walls, paths and other hardscape. Delve into Coffin's design, as it served the goals of Sarah Gibbs Thompson Pell, for an inviting garden enjoyed from the family summer home. See how Marian Coffin removed the previous English Cottage style for a new decade and how the experience of the Great War of 1914-1918 informed aspects of the design. Track the seasonal progression of the King's Garden design and Coffin's plant selection for a northern climate.
Iris Gestram
As a Fellow in the Longwood Graduate Program (UD, 1997), Iris wrote “The Historic Landscape at Gibraltar – A Proposal for its Preservation.” Her research has served as a resource for Gibraltar’s restoration and maintenance, and for other scholars’ work on Marian Coffin and her legacy.
During her career in historic landscape preservation, land conservation and non-profit management, Iris was Director of Education and Visitor Services at historic Longwood Gardens (PA) and Bok Tower Gardens (FL), prior to serving as Executive Director of the National Association for Olmsted Parks in Washington, DC. There, she led preservation, research and advocacy work to promote the national landscape design and planning legacy of the Olmsted firm. As Executive Director of Willowsford Conservancy, Iris led the start-up of a 2,000-acre land conservancy in northern Virginia to a vibrant non-profit conservation, recreation and education organization. Currently, Iris is an executive in Plymouth Meeting, PA. Iris holds MS degrees from the University of Delaware, and Humboldt University in Berlin, Germany.
In this presentation, Iris will explore Marian Coffin’s pioneering role as one of the first female landscape architects in the United States. Renowned for her innovative style, artistic vision, and functional designs, Coffin helped transform American garden architecture and design.
Gibraltar, her celebrated commission in Wilmington, Delaware, serves as a vivid example of Coffin’s design philosophy. Through Gibraltar, Iris will demonstrate Coffin’s simple yet sophisticated style, her design techniques, deep horticultural knowledge, and skillful client collaborations.
With her mastery of symmetry and proportion, the inclusion of dramatic architectural elements, and balance of formal and naturalist elements, Coffin created notable public and private works that have left a lasting impact on American landscape architecture and design.
Marian Coffin’s legacy continues to inspire professionals today, showing the importance of creativity, purpose and determination in overcoming gender barriers in the field.
Shirley Harmon
Curator,
Oxmoor Farm
Shirley Harmon manages the day-to-day operation of the Historic Oxmoor Farm, the Bullitt family home since 1787. Shirley has 27 years of experience in the field of archives and historic home management.
During her college years she worked as a docent at Farmington Historic Home and a fact checker for the Louisville Encyclopedia. In 2009, she was appointed a member of the Lincoln Bicentennial Committee, which planned events in the Louisville area for the celebration of Lincoln’s 200th birthday. She worked at the Filson Historical Society from 1999 to 2006 and again from 2011 to 2012, where her main focus was cataloging the Bullitt Family Papers.
Shirley also serves as the archivist for Norton Healthcare, which is the largest hospital system in Kentucky. She is a member of Phi Alpha Theta, the Society of American Archivists, the American Association of State and Local History, the Southeastern Museums Conference, the Interpretations Committee for Farmington Historic Home, and the Oxmoor Preservation Committee.
Shirley earned her bachelor’s degree in History at Xavier University and her master’s degree in Public History at the University of Louisville.
Marian Coffin largely worked on the east coast for elite clients such as the Vanderbilts, DuPonts, Fricks, and Huttons. Her east coast gardens are well known, but few know of her foray into planning gardens in what is considered the Midwest or upper south. In 1909 she was contracted by William Marshall Bullitt to plan a garden for Oxmoor, his ancestral estate located just outside Louisville, Kentucky. Coffin was recommended to Bullitt by Harry DuPont. That 1909 design is still the foundation for the gardens at Oxmoor today. Interestingly, Bullitt would enlarge the Oxmoor house after Coffin’s landscape plan was implemented and the architect he used was F. Burrall Hoffman, someone Coffin notably worked with on other projects. This presentation will explore Coffin’s Oxmoor garden plan, the issues she had to face with a southern climate, and why Oxmoor was her only notable Midwest/upper south design.
Lauren Kope
Director,
University of Delaware Botanic Gardens
Lauren Kope serves as Director of the University of Delaware Botanic Gardens (UDBG), where she oversees operations and strategic initiatives that connect the University and broader community with the Gardens' living collections. In this role, she works to advance UDBG as a resource for education and public engagement while fostering an appreciation for the beauty, value, and impact of plants. Lauren earned her B.S. in Agricultural Science from Virginia Tech and M.B.A. from the University of Delaware. She is a graduate of the Longwood Gardens Professional Horticulture Program and has held leadership positions in both public and private horticulture.
The Townsend East Lawn and Garden project transformed an existing parking lot into a new central green space, complete with a custom-designed comfort station, a range of gathering spaces, an expanded, shaded Creamery plaza, wildlife-friendly lighting, an outdoor classroom, signage and site furnishings. This space is designed to create a central focal point and sense of arrival at the heart of UDBG's existing garden collections. This new campus landscape features over thirty new shade trees and many new garden collections designed to educate and inspire students and visitors alike. The garden is designed for four seasons of interest and structured around woody species UDBG sought to add to its teaching collection.
Spatially, the project plan is rooted in the idea that south campus should have a significant central green space and relate to Marian Coffin's design of The Green for at main campus. Drawing inspiration from her arrangement of space and using her designs as precedent, the project team created a beautiful new space to be enjoyed by all.
UDBG director Lauren Kope and project landscape architects Rosa Mannion and Erin Ramsden from NV5 will overview the site's context within south campus and UDBG, the design process, inspiration, and planting design.
Stuart Lilie
Vice President of Public History,
Fort Ticonderoga
Stuart Lilie graduated from the College of William and Mary. He worked for Colonial Williamsburg and began his own historic saddlery company. Since 20111, Stuart has led the Public History department at Fort Ticonderoga, which reaches nearly 70,000 visitors annually through daily programs and events. He oversees all aspects of the visitor experience, including living history programs and events, historic trades, heritage breeds, horticulture, museum education, school outreach, and maritime programs. Stuart Lilie leads the cultivation and interpretation of Marian Coffin's 1920 King's Garden at Fort Ticonderoga.
Join Fort Ticonderoga's Vice President of Public History, Stuart Lilie, to explore the 1920 plan of the King's Garden at Fort Ticonderoga. Examine how Marian Cruger Coffin reshaped this garden using existing walls, paths and other hardscape. Delve into Coffin's design, as it served the goals of Sarah Gibbs Thompson Pell, for an inviting garden enjoyed from the family summer home. See how Marian Coffin removed the previous English Cottage style for a new decade and how the experience of the Great War of 1914-1918 informed aspects of the design. Track the seasonal progression of the King's Garden design and Coffin's plant selection for a northern climate.
Rosa Mannion
RLA, ASLA,
NV5
Rosa leads the landscape architecture practice out of NV5’s Philadelphia office. The multi-disciplinary studio focuses on work in the public realm, with emphasis on higher education, public parks, greenways, trails, streets, schoolyards, and green stormwater infrastructure. Rosa is passionate about design within the public realm and strives to create high-quality public amenities for all communities. She received a master’s in landscape architecture from the University of Pennsylvania in 2006.
The Townsend East Lawn and Garden project transformed an existing parking lot into a new central green space, complete with a custom-designed comfort station, a range of gathering spaces, an expanded, shaded Creamery plaza, wildlife-friendly lighting, an outdoor classroom, signage and site furnishings. This space is designed to create a central focal point and sense of arrival at the heart of UDBG's existing garden collections. This new campus landscape features over thirty new shade trees and many new garden collections designed to educate and inspire students and visitors alike. The garden is designed for four seasons of interest and structured around woody species UDBG sought to add to its teaching collection.
Spatially, the project plan is rooted in the idea that south campus should have a significant central green space and relate to Marian Coffin's design of The Green for at main campus. Drawing inspiration from her arrangement of space and using her designs as precedent, the project team created a beautiful new space to be enjoyed by all.
UDBG director Lauren Kope and project landscape architects Rosa Mannion and Erin Ramsden from NV5 will overview the site's context within south campus and UDBG, the design process, inspiration, and planting design.
Erin Ramsden, PLA
Landscape Architect
Erin is a professional landscape architect and educator with diverse professional experience in public landscape design, public horticulture, green stormwater infrastructure research, museum exhibit construction, and sustainability/energy efficiency. She has worked in public gardens across the country, from Chicago to Seattle, expanding her professional experience to landscape architecture in Philadelphia. Her work in public horticulture deeply informs her approach to design, centering plant selection and garden composition as integral to the creation of resilient, ecological, and beautiful spaces. Witnessing the value nature provides for city dwellers, Erin is dedicated to developing thoughtful, contextual, and ecologically focused urban designs.
The Townsend East Lawn and Garden project transformed an existing parking lot into a new central green space, complete with a custom-designed comfort station, a range of gathering spaces, an expanded, shaded Creamery plaza, wildlife-friendly lighting, an outdoor classroom, signage and site furnishings. This space is designed to create a central focal point and sense of arrival at the heart of UDBG's existing garden collections. This new campus landscape features over thirty new shade trees and many new garden collections designed to educate and inspire students and visitors alike. The garden is designed for four seasons of interest and structured around woody species UDBG sought to add to its teaching collection.
Spatially, the project plan is rooted in the idea that south campus should have a significant central green space and relate to Marian Coffin's design of The Green for at main campus. Drawing inspiration from her arrangement of space and using her designs as precedent, the project team created a beautiful new space to be enjoyed by all.
UDBG director Lauren Kope and project landscape architects Rosa Mannion and Erin Ramsden from NV5 will overview the site's context within south campus and UDBG, the design process, inspiration, and planting design.
Josh Twardowski, RLA
Director, Landscape Services, Facilities-Grounds Services,
University of Delaware
Josh has been with the University of Delaware for nine years, first as a Grounds Manager before being promoted to Director of Landscape Services, He is responsible for all landscape and grounds services, athletic field maintenance and waste and recycling services. He also serves as campus Landscape Architect.
More than a century after Marian Coffin helped shape the University of Delaware campus, her vision continues to influence how its landscapes evolve. This presentation explores the ongoing effort to enhance the campus while respecting and preserving Coffin's original design
Student Call for Entries to Juried Exhibition
On September 25, we are holding the second day of a two-day symposium celebrating the legacy of Marian Coffin, landscape architect, on UD's campus and will exhibit student work related to her influence and the enduring power of nature.
We invite undergraduate & graduate students from all disciplines and universities to submit proposals to exhibit works of original artwork, writing, research, and design that embody Marian Coffin's belief in the power of nature and landscape to improve life. Her designs transformed UD's campus and many other significant landscapes by weaving beauty into our daily environment and making a lasting impact on the community.