The first motion picture was shown to a theater audience at the Philadelphia Academy of Music.
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Donald Trump survived an assassination attempt during a campaign rally in Butler, Pennsylvania.
Thirteen Mennonite families arrived in Philadelphia from Germany.
The first Continental Congress meeting was held in Philadelphia, US.
The Women's College of Pennsylvania, US opened – making it the 2nd female medical school in America.
A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
