The Trinity Churchyard in Lower Manhattan is part of the Episcopal Parish of Trinity Church, which has three burial grounds in the city including nearby St. Paul’s and Trinity Cemetery in Washington Heights. While the most notable interment of Trinity Churchyard is definitely Alexander Hamilton, the whole burial ground has a wealth of 17th- and 18th-century funerary symbolism, with plenty of flying skulls and hourglasses. For example, there’s the two-sided tombstone of Richard Churcher, a five-year-old boy who died in 1681. His tombstone is the oldest carved gravestone in the city, and on the back has a dimensional hourglass and skull and bones. James Leeson also has a very unusual stone. The 18th-century gentleman requested that along with classical Masonic markings and funeral iconography his tombstone be marked with an insoluble message. The bizarre-looking words are written in a “pigpen” cypher, sometimes used by Masons to code their text and keep their knowledge out of the hands of the curious. The symbols actually mean “Remember Death,” a classic message for the 18th century which becomes, through the form of an enigma, a version of the well-known “Memento Mori.” --Atlas Obscura.com/Trinity-Churchyard