Explore New York Marble Cemetery, the oldest nonsectarian burial ground in the city. The half-acre Greek Revival-style open space is hidden in the interior of the block, accessible through iron gates and a 100-foot private alley. The garden is surrounded by 12-foot-tall marble walls. There are no individual markers on the lawn; marble plaques in the wall name the original wealthy merchant families, whose 156 underground burial chambers collectively hold more than 2,000 remains. While the deep underground vaults are not accessible to the public, the names and occupations of the dead are all detailed in the cemetery’s registers.