Photius was a Greek prelate who served as the Metropolitan of Kiev and all Rus' during the early 15th century. Born in Monemvasia, he entered monastic life in his youth and later worked alongside Metropolitan Akakios. Consecrated in Constantinople in 1408, he eventually arrived in Moscow to lead a church facing significant challenges, including economic ruin and social instability. Through diplomatic efforts, he eventually unified the metropolitan see under his authority, managing the ecclesiastical affairs of the region until his death in 1431.