We are in the 10 days of darkness.
If Q does post something it will be as a anon during this period.
How many other houses are there that have this style of swimming pool?
After all. most people back then that could afford a pool like that would be elites.
The painting depicts 3 drains in the floor, I do not see any drains in the floor.
I know which house this is, I've been there several times in person and walked around the place.
Oheka Castle, also known as the Otto Kahn Estate, is located on the North Shore of Long Island, in the West Hills section of Huntington, NY
https://en.wikipedia.org/wiki/List_of_largest_houses_in_the_United_States
Expand your's by one more step and look up the Halloween room in the Biltmore House. ;)
A second Vanderbilt House,
https://en.wikipedia.org/wiki/The_Breakers