Monomakh's Cap

Monomakh's Cap (Russian: шапка Мономаха, shapka Monomakha), also called the Golden Cap (Shapka Zolotaya), is a chief relic of the Russian Grand Princes and Tsars. It is a symbol-crown of the Russian autocracy, and is the oldest of the crowns currently exhibited at the Kremlin Armoury. Monomakh's Cap is an early 14th-century gold filigree skullcap composed of eight sectors, elaborately ornamented with a scrolled gold overlay, inlaid with precious stones (ruby and emerald) and pearls, and trimmed with sable. The cap is surmounted by a simple gold cross with pearls at each of the extremities.

• http://en.wikipedia.org/wiki/Monomakh's Cap