The large mausoleum in the center is that of William Rockefeller, Jr. “William Avery Rockefeller Jr. (May 31, 1841 – June 24, 1922) was an American businessman and financier. Rockefeller was a co-founder of Standard Oil along with his elder brother John Davison Rockefeller. He helped to build up the National City Bank of New York, which became Citigroup. He was also part owner of Anaconda Copper Company, which was the fourth-largest company in the world in the late 1920s. He was a prominent member of the Rockefeller family.(Wikipedia).
On the left is the Mausoleum of John Dustin Archbold (See: Sleepy Hollow Cemetery. John Dustin Archbold Mausoleum). The column on the right is part of the Harris plot (See: Sleepy Hollow Cemetery – The Harris Plot). For now I don’t know much about the other structures on the right.
Taken with an Olympus OM-D EM-10 and Panasonic Lumix G Vario 14-42 f3.5-4.6 II