The situation changed with the ascension of Vasily I's successor, Vasily II (r. 1425–62). Before long his uncle, Yuri of Zvenigorod, started to advance his claims to the throne and Monomakh's Cap. A bitter family conflict erupted and rocked the country during the whole reign. After Yuri's death in 1432, the claims were taken up by his sons, Vasily Kosoy and Dmitry Shemyaka, who pursued the Great Feudal War well into the 1450s. Although he was ousted from Moscow on several occasions, taken prisoner by Olug Moxammat of Kazan, and blinded in 1446, Vasily II eventually managed to triumph over his enemies and pass the throne to his son. At his urging, a native bishop was elected as Metropolitan of Moscow, which was tantamount to a declaration of independence of the Russian Orthodox Church from the Patriarch of Constantinople (1448).