The 1.8 million-square-foot mall at Knights and Woodhaven Roads opened on May 11, 1989.

Of the 253 people on board Amtrak Train 188, eight passengers were killed, and more than 150 others were injured after the May 12, 2015, derailment.

Police discovered the extent of his crimes after a murder in Philadelphia.

The seminal MTV reality television show The Real World started filming its 15th season on April 30, 2004.

The white-leather gloves are stained with blood from the night the slain president wore them to the theater.

On April 22, 1970, Philadelphia hosted a six-hour festival in Fairmount Park that drew 25,000 to 30,000 clean-air lovers.

Benjamin Franklin died on April 17, 1790. He penned the inscription that would eventually appear at his Christ Church gravesite.

Semiquincentennial organizers are feeling optimistic. But without a state funding solution, SEPTA says it can't accommodate the estimated one million expected visitors.

The American Philosophical Society's new exhibit for the 250th birthday of America documents daily life in Philadelphia during the fevered days of the Revolutionary War.

Famous for their large, fragrant, cream-colored blossoms, the trees will be planted later this month, in the lead-up to America's 250th birthday in 2026.

"Philadelphia Freedom," written for tennis star Billie Jean King, reached the top of the Billboard Hot 100 on April 12, 1975.

The weekly, citywide, yearlong celebration, organized by the Philadelphia Historic District 250th Committee, will honor America’s 250th birthday

Many of the new artifacts carry the weight of history, but also the freedom stories and intimate histories of the families that long preserved them.