Group of Five New Orleans Historic Homes Ornaments from The Preservation Resource Center, the PRC was founded in 1974 as the authority on the preservation and restoration of historic homes and neighborhoods in New Orleans, approximately each 4" h. Group of Five New Orleans Historic Homes Ornaments from The Preservation Resource Center, the PRC was founded in 1974 as the authority on the preservation and restoration of historic homes and neighborhoods in New Orleans, approximately each 4" h.