Developments in the 20th century formed the current boundaries of the Philadelphia Chinatown. In the 1920s, ramps leading to the Ben Franklin Bridge were constructed at Chinatown's northern edge. At another point, the city condemned an area east of what is now Chinatown so that the new headquarters of the Philadelphia Police Department, Independence Mall, and a hospital could be constructed. At one point the city proposed building an eight lane highway that would divide the Philadelphia Chinatown into two parts and eliminate the Holy Redeemer Church and School. The church and school remained, while the Vine Street Expressway, smaller than its original proposed size, was built. Cecelia Yep, one of the founders of the Philadelphia Chinatown Development Coalition, said "I think we saw it as a plan to get rid of Chinatown. church and school was the only thing good in Chinatown at the time. We thought it was a fight for survival." The construction of the Market East Station in the 1970s and 1980s established Filbert Street as Chinatown's southern border. As a result of the construction of the Pennsylvania Convention Center, which opened in 1993, the Chinatown buildings on Arch Street, up to the intersection of 13th Street, were demolished. In addition, a federal prison, the Federal Detention Center, Philadelphia, opened in the area. "AsianWeek" said "Each was built with much compromising, and now they form a circle around Chinatown’s current core of about five city blocks."