Kallistos I , (died 1363) was the Ecumenical Patriarch of Constantinople for two periods from June 1350 to 1353 and from 1354 to 1363. He died in Constantinople.

Preceded by
Isidore I
Philotheos Kokkinos
Patriarch of Constantinople
Succeeded by
Philotheos Kokkinos
Philotheos Kokkinos

ca:Cal·list I

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