The Washington Square Park Arch is reminiscent of the monumental Arc de Triomphe in Paris. Originally a temporary papier-mache and white plaster structure built to commemorate the 1889 centennial celebration of George Washington's inauguration in NYC. The marble version was dedicated in 1895.
This photo inspired one of my recent illustrations for The Frog Project Design Studio.
Also, if you look closely you will spot me in the photo!