13th 14th century kettle hatKettle hats like this emerged during the Crusades at the end of the 12th beginning of the 13th century. This type of helmet was possibly adopted from Byzantine armies, who had been wearing such helmets for some time. They were worn alongside the nasal helmet. Helmets like these, like spangenhelms, were made from multiple steel pieces. This type was used until the early 14th century, and various variants are depicted in the Maciejowski Bible from 1250.