Regalia of Russian Tsars
Alexis Mikhailovich
Altabas crown

In 1684, a crown of altabas was sewed for Tsar Ivan Alekseevich. Altabas is a precious cloth, similar to brocade. So the crown was named altabas.
It is the only royal crown executed of cloth. For the crown would not lose the shape, it had an inner frame of  smooth silver archs.
The crown was adorned with golden plates enameled with bright colours and coloured with gems. Some of these plates were taken from the not survived Diamond Crown of Tsar Theodore Alekseevich.