Pat's King of Steaks cheesesteak origin claim

Pat's King of Steaks on East Passyunk Avenue claims Pat Olivieri invented the cheesesteak in the 1930s by grilling sliced beef with onions, a story that has become part of Philadelphia culinary folklore. That origin claim is disputed by other vendors and historians, and the rivalry between Pat's and nearby competitors is a long-standing element of local cheesesteak lore. Pat's continues to operate at the same location and is a common stop for tourists exploring the cheesesteak origin debate.