A consort crown is a crown worn by the consort of a monarch for her coronation or on state occasions.
Unlike with reigning monarchs, who may inherit one or more crowns for use, consorts sometimes had special crowns made uniquely for them and which were worn by no other later consort.
All British queens consort in the 20th century, Alexandra of Denmark, Mary of Teck and Elizabeth Bowes-Lyon, wore their own specially made consort crowns, made in 1902, 1911 and 1937 respectively. Previous English and British queens consort had used the crown of Mary of Modena, wife of King James II, until Adelaide of Saxe-Meiningen, the consort of King William IV, who had a special new consort crown created for her.
In Imperial Russia, there were no unique consort crowns, because the Lesser Imperial Crown was intended to be used for coronation of all empresses consort, and after that, they did not wear crowns.