The electric chair used to sit where the four rectangles are in the exact center of the picture. In the background was where they did the autopsy to determine the cause of death. I'm still trying to figure that one out. Sing Sing was the home of the death house from the early 1900's through the 1960's, when it was moved to Greenhaven. In Sing Sing, many notorious criminals were executed, including the Rosenberg's among others.