Links and resources
Museums, parks, archives, preservation groups and the other sites we rely on. Every link here is checked every day.
Events and calendars
History, archives and preservation
- 1930 auction catalog: Contents of Winchester Hall, Bayville
- 27east: Revisiting Villa Maria, A Water Mill Landmark
- American Aristocracy: Salutation
- Brecknock Hall: weddings and events
- Cleveland Museum of Art: capital fragment from the Ferguson collection
- Columbia University Avery Library: McKim, Mead & White plan for the Whitney country house
- Cow Neck Peninsula Historical Society: The Community Synagogue
- Daily Mail: Land’s End faces demolition
- Dan’s Papers: What a Family! The Multifaceted and Curious Wilzigs (2021)
- Fire Island News: campus listed for sale again (2026)
- Friends for Brecknock Hall
- Friends for Brecknock Hall: Guided Tours
- Galerie Magazine: Oheka Castle headed to auction (2026)
- Glen Cove Public Library: J.P. Morgan Estate aerial view record
- Glen Cove Public Library: Killenworth Estate photograph record
- Glen Cove Public Library: Pembroke aerial view record
- Half Pudding Half Sauce: Farnsworth, with period photographs
- Half Pudding Half Sauce: Ferguson Castle
- Half Pudding Half Sauce: Killenworth
- Half Pudding Half Sauce: Meudon
- Half Pudding Half Sauce: Rosemary Farm
- Historic Houses blog: The Braes
- Homes of the North Fork
- HouseHistree: Idle Hour
- Huntington Historical Society: Former Conklin Amphitheater
- Library of Congress HABS: Harold I. Pratt House
- Library of Congress: HABS documentation of Sagamore Hill
- Library of Congress: HABS record for Laurelton Hall
- LIU Post: the Post estate (archived page)
- Long Island Oddities (archived)
- Los Angeles Times: the last gasp of the Gatsby house
- Mansions of Southampton
- Mead Art Museum: the Rotherwas Room from The Braes
- Metropolitan Museum of Art: Loggia from Laurelton Hall
- Montauk Library Archives: A Stay at the Manor
- Morse Museum: Laurelton Hall
- Mount Vernon: Muttontown Meadows (now Nassau Hall)
- Nassau County Museum of Art: Plan Your Visit
- National Park Service NPGallery: Gould-Guggenheim Estate
- National Park Service NPGallery: Lillian Sefton Dodge Estate
- National Park Service NPGallery: Montauk Manor
- National Park Service: Mackay Estate Gate Lodge National Register record
- National Park Service: Ormston (Olmsted landscape)
- National Park Service: Sanderson Estate (Olmsted gardens)
- National Register boundary increase (2010), National Archives
- National Register nomination (1976), National Archives
- National Register nomination (Cedarmere-Clayton Estates), National Archives
- National Register nomination (Gould-Guggenheim Estate), National Archives
- National Register nomination, National Archives
- National Register nomination, National Archives
- National Register nomination, National Archives
- National Register nomination, National Archives
- National Register nomination, National Archives
- National Register nomination, National Archives
- National Register nomination: DuPont-Guest Estate (2009, PDF)
- National Register nomination: John E. Aldred Estate (1979, PDF)
- National Register nomination: U.S. Merchant Marine Academy Historic District (2014, PDF, 77 MB)
- National Register nomination: Woolworth Estate (1979, PDF)
- National Register of Historic Places record
- National Register of Historic Places record
- National Register of Historic Places record
- National Register of Historic Places record
- National Trust for Historic Preservation: Long Island’s lost Gilded Age mansions
- New York State Department of Health profile: Glengariff Health Care Center
- North Shore Land Alliance: Seminary of the Immaculate Conception
- NYIT de Seversky Mansion: Our History
- Oheka Castle: Mansion Tours
- Old Long Island
- Old Long Island: Forker House
- Old Westbury Gardens: Plan Your Visit
- Planting Fields: Hours and Admission
- Preservation Long Island: Idle Hour
- Preservation Long Island: St. Ignatius Retreat House at Inisfada
- Raymond E. Spinzia on Beacon Towers and the Gatsby legend (PDF)
- Raymond E. Spinzia: In Her Wake, the story of Alva Smith Vanderbilt Belmont (PDF)
- Reuters: Mansion linked to The Great Gatsby demolished (2011)
- Roslyn Landmark Society: Cedarmere
- Roslyn Landmark Society: Exploring the ruins of Knollwood
- Roslyn Landmark Society: Harbor Hill, the Clarence Mackay estate
- Roslyn Landmark Society: Mackay Estate Gate Lodge
- Sands Point Intensive Level Survey (SPLIA, 1991)
- Sands Point Preserve Conservancy: Falaise Tours
- SMU digital collections: The Chimneys
- Suffolk County Parks: Coindre Hall Historical Tours
- The American Architect, September 17, 1919: Pembroke (PDF scan)
- The American Architect, September 1915, Farnsworth plates
- The Caumsett Foundation
- The Cultural Landscape Foundation: Caumsett
- The Cultural Landscape Foundation: Planting Fields
- The Friends of Cedarmere
- The Leader (2017): Russian compound closed in Upper Brookville, not Killenworth
- The Touchstone, 1917, with photographs of The Monastery
- Untapped Cities: Ferguson Castle
- Untapped New York: The Secrets of Winfield Hall
- Vanderbilt Cup Races: Beacon Towers then and now
- Vanderbilt Museum: Hours and Admission
- Vanderbilt Museum: Mansion Tours
- Village of Lattingtown: History of Lattingtown Harbor and Meudon (PDF)
- Webb Institute: Visit Webb
Tours and travel
Films, books and video
Gilded Age houses beyond Long Island
Official mansion and museum sites
- Bayard Cutting Arboretum: Hours and Fees
- Bayard Cutting Arboretum: Manor House Tours
- Caumsett State Historic Park Preserve
- Chelsea Mansion
- Falaise at Sands Point Preserve
- Glengariff Rehabilitation and Healthcare Center: History of Glengariff
- Hempstead House at Sands Point Preserve
- HMTC: Hours of Operation
- Holocaust Memorial & Tolerance Center of Nassau County
- LIU Post: Facilities and Venues (Great Hall, Winnick House)
- Long Island University: LIU History
- Mill Neck Family of Organizations: Mill Neck Manor
- Mill Neck Manor
- Mill Neck Manor: Manor Tours
- Montauk Manor (official site)
- Montauk Manor: History
- Morse Museum: Louis Comfort Tiffany’s Laurelton Hall
- Nassau County Museum of Art
- Nassau County Museum of Art (Clayton)
- Nassau County Museum of Art (official site)
- Nassau County: Museums (Cedarmere listing)
- Nassau County: Muttontown Preserve
- Nassau County: Welwyn Preserve
- National Park Service, Olmsted Archives: Whitney Hall
- National Park Service: Harry E. Donnell House, National Register record
- National Park Service: Operating Hours and Seasons
- National Park Service: Sagamore Hill National Historic Site
- National Park Service: Touring Theodore Roosevelt’s Home
- New York State Parks: Caumsett State Historic Park Preserve
- NY State Parks: Bayard Cutting Arboretum State Park
- NY State Parks: Caumsett State Historic Park Preserve
- NY State Parks: Planting Fields Arboretum State Historic Park
- NYIT de Seversky Mansion
- Oheka Castle (official site)
- Oheka Castle: History
- Old Westbury Gardens
- Old Westbury Gardens (official site)
- Old Westbury Golf and Country Club (private)
- Peconic Landing: Brecknock Hall
- Planting Fields Arboretum
- Planting Fields Foundation (official site)
- Preservation Long Island
- Sands Point Preserve
- Sands Point Preserve Conservancy (official site)
- Sands Point Preserve Conservancy: Castle Gould
- Sands Point Preserve Conservancy: Falaise
- Sands Point Preserve Conservancy: Hempstead House
- Sands Point Preserve Conservancy: Hours and Admission
- Sands Point Preserve Conservancy: Mansion Tours
- St. Josaphat’s Monastery
- Suffolk County Parks: Coindre Hall
- Suffolk County Vanderbilt Museum (official site)
- The Community Synagogue
- The Mansion at Glen Cove
- The Mansion at Glen Cove
- The Mansion at Glen Cove (official site)
- The Mansion at Glen Cove: Mansion History
- U.S. Merchant Marine Academy: Visiting USMMA
- Vanderbilt Museum: History
- Village of Laurel Hollow: Tiffany and Laurelton Hall
- Walt Whitman Birthplace
- Webb Institute
- Welwyn Preserve (Nassau County)
Links last checked October 19, 2026. A link that stops working is taken off this page until it is fixed. To suggest a site, use the contact page.