Maritime history of Florida
Spain ceded Florida to the United States as part of the Adams–Onís Treaty of 1819, and Florida became a U.S. territory in 1821. Coastal trade with other markets continued to expand and towns like Jacksonville, Pensacola and Tampa became important ports. After becoming a U.S. territory, the federal government began building a series of lighthouses as aids to navigation along the coasts of Florida to mark dangerous headlands, shoals, bars and reefs.
Tampa Bay
The United States acquired Florida from Spain in 1821. The name "Spirito Santo" seems to have disappeared from maps of the region in favor of "Tampa Bay" (sometimes divided into Tampa and Hillsboro Bays) soon after the US established Fort Brooke at the mouth of the Hillsborough River in 1824.