Can you guess when this photograph was taken? We'll update later with the answer and more details on what exactly is going on here.

UPDATE: The (first) photo above was taken at the groundbreaking ceremony for Lincoln Center on May 14th, 1959. The shovel that President Dwight D. Eisenhower used at the ceremony is still around, and here's some more from the Lincoln Center time capsule. We've added more photos that were taken a few years later in 1962, showing the construction of the site, as well as one of what the site looked like before ground was broken, in 1955.