The Diplomat
In the midst of an international crisis, Kate Wyler, a career diplomat, lands in a high-profile job for which she is not suited, with tectonic implications for her marriage and her political future.
Locations of L.I. Shoots:
Season 3
Three Nassau County filming locations:
- de Seversky Mansion, Old Westbury: Interiors representing Blair House, the president’s guest residence in Washington.
- Seacroft Estate, Centre Island: The waterfront property representing President Grace Penn’s vacation home in Amagansett.
- Coe Hall, Planting Fields, Oyster Bay: The mansion representing British Prime Minister Nicol Trowbridge’s country residence. Production reportedly occupied the property for more than two months.
Season 4 filming — Nassau County
1. Woolworth Estate (Winfield Hall) — Glen Cove
The historic Woolworth mansion was used for the Equerries Room at Windsor Castle, where staff members gather in Episode 2.
2. St. Josaphat’s Monastery — Glen Cove
Located at 1 East Beach Drive, the monastery provided interiors representing the Royal Library at Windsor Castle.
3. Cathedral of the Incarnation — Garden City
Located at 36 Cathedral Avenue, this historic church was identified by series creator Debora Cahn as the location representing St. George’s Chapel at Windsor Castle, where Kate and Hal renew their vows.
These locations were confirmed in an October 15 interview with Cahn in Town & Country



