Old Louisville is a historic district and neighborhood in central Louisville, Kentucky, United States. It is the third largest such district in the United States, and the largest preservation district featuring almost entirely Victorian architecture. It is also unique in that a majority of its structures are made of brick, and the neighborhood contains the highest concentration of residential homes with stained glass windows in the U.S. Many of the buildings are in the Victorian era styles of Romanesque Revival, Queen Anne, or Italianate, and many blocks have had few or no buildings razed.