Article Photos: Party, symposium celebrate 20 years of Preservation Oklahoma

A crowd gathers outside to listen to a band in the Plaza District, a revitalized stretch of NW 16 between Classen Drive and Pennsylvania Avenue. The area has become an Oklahoma City arts center, hosting frequent outdoor events. Photos provided

A crowd gathers outside to listen to a band in the Plaza District, a revitalized stretch of NW 16 between Classen Drive and Pennsylvania Avenue. The area has become an Oklahoma City arts center, hosting frequent outdoor events. Photos provided