De Seversky Mansion

Alfred I. du Pont built this house in 1918 and called it White Eagle. It has been renamed twice since, survived a Guest family polo dynasty, and now belongs to a technology university that rents it out for weddings. That last part is the good news: you get a Gold Coast estate with a working kitchen and a staff, rather than a landmark that needs a permit and four rental trucks.

White Eagle, then Templeton, then a Russian aviator

Thomas Hastings designed it and it cost $1.1 million in 1918 dollars. In 1926 Frederick and Amy Phipps Guest bought the estate and renamed it Templeton. Two years later Amy Guest had the marble entry hall and staircase pulled out of her parents’ Fifth Avenue residence and installed here, which is why the first thing you walk into feels like it came from a different building. It did.

The house passed to her son Winston Guest, the polo player, in 1959. New York Institute of Technology bought it from the family in 1972 and renamed it for Alexander P. de Seversky, the Russian-born aviator and aircraft designer. The mansion’s own history page tells this straight, including the thirteen European country-style bedrooms and parlors originally done by Charles of London.

Where the guest count actually breaks

The mansion’s own FAQ publishes a range — “a minimum of 50 and a maximum of 300 adult guests” — and its floor plan page publishes a room-by-room chart. The venue’s Cvent listing adds square footage, and reading the two together changes what the word “300” means here. The venue’s Cvent listing does, and it is worth reading closely because it changes what the word “300” means here. Total event space is listed at 6,815 square feet across five rooms: Ballroom 2,080 sq ft for 180, Dining Room 2,013 sq ft for 144, Garden Room 1,000 sq ft for 100, Terrace Room 864 sq ft for 70, Library 858 sq ft for 50. The same listing gives a standing capacity of 300. The mansion’s own FAQ puts the bookable range at 50 to 300 adult guests.

So a three-hundred-person wedding here is a three-hundred-person wedding spread through a house, not three hundred people seated in a ballroom. The largest single room seats 180 by that listing — and NYIT’s own floor plan drops the Ballroom to 150 once a dance floor goes in, which is every wedding. If you have a 250-person guest list and a seated dinner in mind, that is the first thing to raise on the tour, before anyone shows you the staircase.

Five places to stand and say it

The mansion names its ceremony spots individually, which is more useful than the usual “indoor or outdoor” shrug. The Linden Tree is the signature one and blooms May through November, with enough shade to survive an August afternoon. The Patio sits on the west side over the lake. The East Lawn puts the mansion itself behind you, which is the frame most photographers will push for.

The Garden Room is fully glazed, so it reads as outdoors and doubles as the rain plan. The Ballroom takes the ceremony indoors when the guest count is large and the reception is happening elsewhere in the house. Ask which of these is held for you and which is shared, and ask what the turnaround looks like if the ceremony and the dinner want the same room.

Three formats, and only one of them uses the whole house

They sell weddings in three shapes: Traditional, which is cocktail hour, seated dinner and a dessert café; European, which moves dinner and dancing into the ballroom or dining room and closes with a European dessert café; and Gatsby, a mansion-wide cocktail party with chef-attended stations and open bars in multiple rooms. Gatsby is the format the standing-capacity number was written for. If you want the estate to feel full rather than sectioned, that is the one to price out first.

For comparison with the rest of the Gold Coast estates, the distinction that matters is whether a house comes with a kitchen. This one does — the mansion says its own culinary team prepares every menu item in-house, with outside caterers allowed only where its kitchen cannot produce the cuisine you want.