Several marble panels fell off a Rittenhouse Square building shortly before rush hour and crashed several stories to the sidewalk.
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Police say no one was hurt. Traffic had to be detoured after the large square panels fell off the facade around 7 a.m. Wednesday.
The six-story building until recently housed a French bistro on the first floor, and has offices and studios on the upper floors.
It's commonly called The Broadcast Building, because it was home to KYW-TV and The Mike Douglas Show in the 1960s.
City inspectors are investigating.