Port: The “Second” Ancestral Roman Helmet

Although they don't initially look alike, the Port style and the Agen style are highly comparable. They were in use from around 100 BCE to 100 CE, during the Late Republic and Early Imperial eras of Roman history, and they also clearly display a Celtic influence. They resemble the Coolus style of the Roman helmets in terms of aesthetics, albeit the Port style is noticeably more "Roman" than the Agen style. They were fashioned of iron rather than bronze or brass, just like the Agen helmets. Only a few Roman helmets in the Port design are known to have endured till the present day.

The Port and Agen styles don't instantly look alike, yet they both had aspects that would subsequently become commonplace in other designs. Both types of helmets have cheek protection and a deep, circular bowl shape with flattened tops and steep edges. The Port style of helmets has a bowl that extends downward at the back and has two noticeable embossed ridges. Along the front of the helmet, they have a pair of straightforward, recurved eyebrows that are embossed. The Port Type, however, has a more pronounced neck guard and a less pronounced brim than the Agen style.