Photo Tour: Wharf Historic District, Downtown PittsburghHere is the Wharf Historic District, a part of downtown located near the Monongahela River. Some of the buildings in these photographs are among the city's oldest surviving structures. I took special care to photograph early residential structures and low-level buildings, as these are generally the oldest. Some may have survived the great fire of 1845. I find Pittsburgh's early colonial history fascinating, and it is fun to wonder just how old some of the surviving buildings are!