Naval Square, Philadelphia
Naval Square is a gated community within the Graduate Hospital neighborhood of Philadelphia that served as the first United States Naval Academy from 1834 to 1845, when the Naval Academy formed in Annapolis. It continued as a retirement home for sailors and marines and was called the Naval Home until 1976, when the facility was relocated to Mississippi.
Fort Severn
Fort Severn, in present-day Annapolis, Maryland, was built in 1808 on the same site as an earlier American Revolutionary War fort of 1776. Although intended to guard Annapolis harbor from British attack, it never saw action during the War of 1812. The United States Navy acquired Fort Severn and two other military bases from the United States Army on 19 October 1845. The Academy used the structure for classrooms until its demolition in 1909.