Career

In 1454, when Theodosius was still archimandrite of the Moscow Kremlin"s Chudov Monastery, he was promoted to the office of Archbishop of Rostov. After the death of Metropolitan Jonah in 1461, Theodosius became Metropolitan of Moscow and all Rus" in early May 1461. He was the first metropolitan appointed by the Grand Prince after the fall of Constantinople to the Turks (in 1453), although his predecessor, Iona, is considered the first independent metropolitan of Moscow and All Rus" as he was appointed in 1448 without the approval of the Patriarch of Constantinople.

Theodosius" appointment was, however, eventually blessed by the Metropolitan of Caesarea Philippi on behalf of the patriarch of Constantinople in April 1464.

Since his first days as a metropolitan, Theodosius sought to eradicate unscrupulousness among the priests and educating the clergy in his province. Theodosius"s attempts at reshaping the clergy failed.

When he started sifting through the priests and defrocking those unfit for preaching, many parishes were left without priests. Ordinary people had nothing against their priests, therefore, they started to voice their discontent and damn the metropolitan.

The metropolitans of Lithuania had been opposed for several decades (going back at least to the metropolitanate of Photius(Fotii) in Moscow, and would continue after Theodosius" tenure.

Theodosius resigned the metropolitan office and retired to Chudov Monastery, where he had previously been archimandrite, after only 3 years. He later transferred to the Troitse-Sergiyeva Lavra north of Moscow where he died in 1475. He is buried in the Troitse-Sergiyeva lavra.