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.
List of county seats in Florida
There are 67 counties in the state of Florida. It became a territory of the U.S. in 1821 with two counties complementing the provincial divisions retained as a Spanish territory: Escambia to the west and St. Johns to the east, divided by the Suwannee River. All of the other counties were apportioned from these two original counties. Florida became the 27th U.S. state in 1845, and its last county was created in 1925 with the formation of Gilchrist County from a segment of Alachua County. Each county has a county seat. In Florida, county seats typically have a courthouse at a town square. Of the current 67 counties and one historic county, 31 counties have changed their county seat at least once.