I read a while about Russian crowns, and unfortunately it's been greatly unsystematic. Certain unification dates back only to 1762 when the "Big imperial crown" (that shown in JKP's figure above) was crafted for the coronation of Catherine the Great. Prior to that, Tsarinas Catherine I, Anne and Elisabeth, as well as Tsar Peter II each had their own crown. Prior to that still, Russian rulers used hats, not crowns, and Peter the Great was the last one to use the coronation hat.
Along with main, or "big", crowns, lesser, or "small" crowns were used (as far as I understand, for female monarchs only) - those mostly for "everyday" occasions, such as ceremonies. In 1801 a small crown was made for Tsar Alexander I's wife who was not the reigning person. In 1884, a "wedding" crown was made which was used by brides at weddings of members of the reigning family, albeit those were princes or princesses only.
Along with main, or "big", crowns, lesser, or "small" crowns were used (as far as I understand, for female monarchs only) - those mostly for "everyday" occasions, such as ceremonies. In 1801 a small crown was made for Tsar Alexander I's wife who was not the reigning person. In 1884, a "wedding" crown was made which was used by brides at weddings of members of the reigning family, albeit those were princes or princesses only.
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