Tricornio (hat) worn by Guardia Civil. It is said the hats have square back-sides so the guards can lean against the wall while enjoing a cigarette.
Guardia Civil Hat (Tricornio)
What is the history of the hat worn by the Spanish Guardia Civil? - Quora
A Spanish police officer guards the wreckage after two Boeing 747 airliners collided and burned that kill 583 people on the runway of Tenerife Los Rodeos Airport in the Canary Islands, Spain
An Icon for Law and Order
Guardia civil hat hi-res stock photography and images - Alamy
From Larry Campos: TRICORNIO DEL - Hawaiian Spaniards
What is the history of the hat worn by the Spanish Guardia Civil? - Quora
Why do they wear that hat?
Guardia civil hat hi-res stock photography and images - Alamy