Western Turkish helm from the 9-10th century.

This two tone helmet is exquisite in detail. The shape is known as Shishak and may be likened to the dome of a Russian church, often called an Onion Dome. The shape begins with a hemisphere, which abruptly increases the angle of curve as it comes to the center, where it quickly rises to a point.

Helmets of this shape have been used in the East since time immemorial.