This step was taken by his grandson, Ivan IV (Ivan the Terrible, because of his insane cruelties; 1533-1584). 赫伯特·乔治·威尔斯.世界史纲.
The successors of Constantine no longer reigned in Constantinople, and Ivan took possession of the Byzantine double-headed eagle for his arms. 赫伯特·乔治·威尔斯.世界史纲.
Ivan III did not, however, carry his claim to be the heir of the Christian rulers of Constantinople to the extent of assuming the imperial title. 赫伯特·乔治·威尔斯.世界史纲.