Fort Maurepas, later known as Old Biloxi, was developed in colonial French Louisiana in April 1699 along the Gulf of Mexico . Fort Maurepas was designated temporarily as the capital of Louisiana in 1699. The capital was moved from Ocean Springs to Mobile in 1710, then to New Orleans in 1723 on the Mississippi River. Government buildings in the latter city were still under construction.

The Gulf of Mexico is an ocean basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States; on the southwest and south by the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatán, and Quintana Roo; and on the southeast by Cuba. The Southern U.S. states of Texas, Louisiana, Mississippi, Alabama, and Florida, which border the gulf on the north, are often referred to as the "Third Coast" of the United States.