 However, his claim caused division within the family; his principal rival, and the only one to reject his claim was Grand Duke Nicholas.In 1926 at a (Russian) monarchists congress in Paris the delegates voted to recognize Grand Duke Nicholas as their leader; however, with Nicholas's death in 1929 Kirill became the undisputed leader of the monarchists.After claiming the throne, Kirill became known as the "Soviet Tsar" because in the event of a restoration of the monarchy, he intended to keep some of the features of the Soviet regime.