Konstantinos von Habsburg and Anemas, Despot of the Romans, was the eldest child and heir apparent of Emperor Hadrian II and his wife Empress consort Beatrice. He is known better in Russia as the Grand Duke and Tsesarevich of Russia, and in Portugal and its dominions as the Prince Royal of Portugal and the Algarves as well as the Duke of Braganza. Due to his Habsburg ancestry, he is also an Archduke of Austria. He was born in the Purple Chamber of the Great Palace, making him a Porphyrogennetos.
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