St. Joseph emerged on Florida’s Gulf Coast during the speculative boom of the 1830s. Established in 1835, the port competed with nearby Apalachicola for cotton and shipping business and was connected by rail to the interior. Promoters laid out streets, sold lots, and advertised a prosperous future, although the settlement stood in a vulnerable coastal environment. Its brief importance made it a plausible location for a convention charged with preparing territorial Florida for admission to the United States as a state.

Fifty-six elected delegates assembled at St. Joseph on December 3, 1838. Working for thirty-four days, they debated the structure of the proposed government, representation, taxation, banking, voting, and the distribution of power among regions. The constitution they completed reflected the politics of a slaveholding territory. It protected slavery and restricted political participation while creating executive, legislative, and judicial institutions for the anticipated state. Florida voters approved the document in 1839, but national disputes over the balance between slave and free states delayed admission.

Congress admitted Florida as the twenty-seventh state on March 3, 1845, and the St. Joseph constitution initially provided its governmental framework. The document was later replaced, but the convention established an enduring precedent for Florida’s constitutional history. Its proceedings also reveal conflicts between East, Middle, and West Florida and between advocates of popular control and concentrated authority. The museum’s interpretation therefore concerns more than a ceremonial step toward statehood; it addresses how a territorial elite defined citizenship and government while excluding enslaved people, women, and many other residents.

St. Joseph itself nearly disappeared before statehood arrived. A yellow-fever epidemic devastated the town in 1841, commercial activity declined, and a hurricane in 1844 damaged what remained. Buildings were abandoned or dismantled, and the once-promoted port became an archaeological and commemorative landscape near modern Port St. Joe. Because the convention hall did not survive, later generations had to reconstruct the setting from documents and local memory. This contrast between an ambitious constitution and an ephemeral boomtown gives the site much of its historical force.

Florida established the museum in the twentieth century, and the present park interprets the delegates’ work through exhibits, artifacts, reproductions, and a reconstruction of the convention setting rather than an intact 1838 building. The grounds commemorate both the drafting process and the lost town of St. Joseph. Visitors can place the familiar story of Florida statehood beside the less celebratory realities of territorial speculation, disease, coerced labor, and restricted citizenship. The site preserves the location where a government was designed even though the community that hosted the convention survived for only a few years.