 Its three 17-story highrise project towers were demolished in 2002 and replaced with suburban-style low-rise houses, a development named Lucien Blackwell Homes after the congressman.Mill Creek was the site of the 2000 "Lex Street Massacre," in which four men killed seven others and wounded three in retaliation for damage to a car, Philadelphia's worst killing spree in modern history.The Rudolph Blankenburg School, the Mayer Sulzberger Junior High School, and Institute of the Pennsylvania Hospital are listed on the National Register of Historic Places.