Patriarch Cyril (Bulgarian: Патриарх Кирил; secular name Konstantin Markov Konstantinov [Bulgarian: Константин Марков Константинов]; January 3, 1901 – March 7, 1971) was the first Patriarch of the restored Bulgarian Patriarchate.
On May 10, 1953 Cyril was elected Patriarch of Bulgaria, holding the position until his death.
Cyril was buried in the main church of the Bachkovo Monastery, 189 kilometres from Sofia.
Cyril's historical role in the Bulgarian popular resistance to the Holocaust is recounted in the oratorioA Melancholy Beauty, composed by Georgi Andreev with libretto by Scott Cairns and Aryeh Finklestein. The text describes "Metropolitan Kyril" in 1943 confronting the captors of Bulgarian Jews slated to be deported. Kyril first pledged to go with the deportees in solidarity and then told the guards he will block the train with his own body. The guards replied that they have just received new orders to release the Jews.