Louisiana without thoroughly accounting for the influence of the petroleum and gas industries. Since the 1980s, these industries' headquarters have consolidated in Houston, but many of the jobs that operate or provide logistical support to the U.S. Gulf of Mexico crude-oil-and-gas industry remained in Louisiana . In 1849, the state moved the capital from New Orleans to Baton Rouge. Donaldsonville, Opelousas, and Shreveport have briefly served as the seat of Louisiana state government. The Louisiana State Capitol and the Louisiana Governor's Mansion are both located in Baton Rouge. The Louisiana Supreme Court, however, did not move to Baton Rouge but remains
Louisiana State Capitol and the remaining territory east of the Mississippi was turned over to Great Britain. The French reclaimed Louisiana from the Spanish in 1803 after the Treaty of San Ildefonso in 1800; the territory was then sold as the Louisiana Purchase to the United States. The ceremonial transfers of Louisiana from Spain to France took place in front of the colonial seat of government, the Cabildo, in November 1803, with the transfer from France to the U.S. occurring there, as well, less than a month later. New Orleans continued to be the location of the capital of the Territory of Orleans,