Pat's King of Steaks - claimed origin of the Philadelphia cheesesteak (disputed)

Pat's King of Steaks, founded by Pat Olivieri in 1930, is traditionally credited by the restaurant with inventing the Philadelphia cheesesteak after a hot‑dog vendor reportedly grilled beef and served it on an Italian roll. Competing origin stories-most notably Gino's Steaks, opened by a former Pat's employee-have made the exact origin of the cheesesteak a matter of local dispute. Pat's remains one of the city's most famous sandwich shops and a focal point in debates over the sandwich’s history.