Pat's King of Steaks and the cheesesteak origin claim

Pat's King of Steaks in South Philadelphia claims that Pat Olivieri invented the cheesesteak in the 1930s when he served a grilled beef sandwich to a taxi driver and later added cheese. The shop, founded by the Olivieri family, remains a landmark on East Passyunk Avenue and a focal point of local culinary lore. Multiple competing origin stories exist, including claims by other vendors and families, and the cheesesteak's exact origin is historically debated.