Pat's King of Steaks - cheesesteak origin claim

Pat's King of Steaks, founded in 1930 on East Passyunk Avenue, claims Pat Olivieri invented the Philadelphia cheesesteak in the 1930s when he began selling steak sandwiches from a pushcart. The shop is famous for its long-running rivalry with Geno's directly across the intersection. The origins of the cheesesteak are debated among local historians and rival establishments, but Pat's remains a central icon of Philadelphia food culture.