Hotel Knickerbocker, 1913.

Not to be outdone by his cousin and occasional real estate rival William Waldorf, who had funded the Hotel Astor, John Jacob Astor IV built the Hotel Knickerbocker just a few blocks away. The Knickerbocker, like the Astor, was a Beaux-Arts building. Designed by Marvin & Davis, the 1906 hotel had a prominent mansard roof and light colored terra cotta decoration on its red brick facade. The hotel had 556 rooms, a 2000 seat theatre, and a Maxfield Parrish mural "Old King Cole" in its bars. (That mural has been installed in the St. Regis Hotel bar since 1935.) Supposedly the martini was invented in the bar at the Knickerbocker, though evidence proves otherwise.

Astor would die in the sinking of the Titanic in 1912 and the hotel was closed and converted into offices in 1920 under financial strain by Astor's son. In the next nearly 100 years the building functioned as offices, residences, showrooms and studios for garment companies, and finally as of 2015, a hotel once again.