The Bradley Martin Ball is sometimes referred to as the last big moment of the Gilded Age. It was a very ostentatious event that sparked a lot of debate, and in some ways helped usher in the crumbling of New York’s Victorian-era society culture.
Research:

Behind the Scenes Minis: Paddles and The British Museum
31:02

Ashurbanipal
37:29

Six Impossible Episodes: Back-to-Court
41:15