Government House (), also known as Governor's House, is located at 48 King Street in St. Augustine, Florida, adjacent to the Plaza de la Constitución. The building, constructed of coquina, served as the governor's official residence from c. 1710 during the First Spanish Period (1565–1763), throughout the British Period (1763–1784), and until 1812 in the Second Spanish Period (1784–1821). Governor Gonzalo Méndez de Canzo was the first governor to build his residence on the present Government House site in 1598. A new structure was built on the site in 1706 for use as a residence, office, courthouse, and the social center of the town. The east wing of the present building dates to the original construction between 1706 and 1713. Due to the 1763 Treaty of Paris, Florida passed into British ownership. During the British Period, the house was the official residence of James Grant, the British royal governor of East Florida (1764–1771). Among his guests were American explorer Daniel Boone, who was in East Florida to inquire about land purchases, and Patrick Tonyn, who was appointed as Grant's successor. At the close of the American Revolution, Florida and St. Augustine were returned to Spain by the 1783 Treaty of Paris. General Nathanael Greene visited Government House in 1784, hosted for an elaborate seven-course meal by Governor Vicente Manuel de Zéspedes. From 1785–87 the governor’s residence again underwent major renovation. The last governor to use the house was Enrique White during the Second Spanish Period; he died in 1811. By the time Florida was annexed by the United States in 1821, the building was in ruins with only the walls remaining. In 1833–34 Government House was rebuilt with federal funds, following plans drawn up by architect Robert Mills, later famous for designing the Washington Monument. The structure incorporated existing walls and contained 16 rooms, including space for a post office, a courtroom, and other federal functions. During the American Civil War federal troops were headquartered in the building. In 1873 another major remodeling took place, using plans by architect William M. Kimball. Through the next 60 years the post office and customs house gradually took over more and more of the building as the town grew. In 1937, Government House was once again renovated by Jacksonville architect Mellen Clark Greeley as a Works Progress Administration (WPA) project. The U.S. Postal Service continued to use the building until 1965, when a