One of the twin Spanish colonial buildings flanking St. Louis Cathedral, this one, on the right, was built on the site of the priests' residence, or presbytere. It served as a courthouse under the Spanish and later under the Americans. It is now a museum showcasing a spectacular collection of Mardi Gras memorabilia. Displays highlight both the little-known and popular traditions associated with New Orleans's most famous festival. "Living with Hurricanes: Katrina and Beyond"
is a $7.5 million exhibition exploring the history, science, and powerful human drama of one of nature's most destructive forces. The building's cupola, destroyed by a hurricane in 1915, was restored to match the one atop its twin, the Cabildo. Allow at least an hour to see the exhibits.