Who invented the first hat?

Rather than having a single inventor, the hat was developed over time, possibly originating in Thebes, Greece. A wall painting in a Thebes tomb shows a man wearing a straw hat, which dates the first hat to approximately 3200 B.C.

The pileus cap was a type of Phrygian bonnet made of felt and worn by the ancient Greeks, Romans, Amazons, Phrygians and Trojans. Some pileus caps were worn to symbolize the wearer's occupation. Other pileus caps were a stiff, strong, conical peaked hat and often symbolized freedom, because they were often worn by slaves who were set free. A petasus was another brimmed, circular hat worn by the Greeks.