The town of St. Francisville is designated as the "Capital of West Florida Republic" because it served as the capital of the Republic of West Florida in 1810.
La. R.S. 25:704
St. Francisville as "Capital of West Florida Republic"
Acts 1990, No. 1021, §1.
Official source: Louisiana State Legislature. Reproduced from public-domain Louisiana statutes; confirm against the official source for the current text. Not legal advice.