During the three decades that the Coast Guard was based on the island, Castle Williams held an annual haunted house.

Between 1807 and 1812, he designed and constructed Castle Williams to defend New York Harbor.

A walking tour past Fort Jay, the Governor's House and Castle Williams.

Castle Williams was the first casemated battery in the United States.

The southwest shoreline of the original island, which occupied about 65 acres, stretched from the present site of Castle Williams to the South Battery.

The second major fortification, Castle Williams was started in 1807 and substantially completed in November 1811.

"If you place a blueprint of the Globe onto a blueprint of Castle Williams, it fits like a hand into a glove."

During the Civil War, Castle Williams became a prison that housed as many as 1,000 Confederate soldiers.

Gov. George Clinton of New York pressed Congress to begin Castle Williams in 1794, but it was not completed until 1811.

From 1810 to 1812 he served as the superintendent engineer of works on Governors Island in the construction of Castle Williams.