Where is the option for blacksmith to make helmets?

[Ichangedmyname]

I click on the artisin building but can only make weapons.

[spekt3r]

helmets are made by an amourer not a blacksmith.

[Myrden]

You also need to choose the Basic Armormaking development.

[TruXurT]

And for full clarity, you can set up armorer shop in the backyard of lvl 2 (or more) house

[Ichangedmyname]

Ok thanks yeah I got the development point.