Sofia First Chronicle

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The Sofia First Chronicle (Russian: Софийская первая летопись, romanized: Sofiyskaya pervaya letopis'^[1]) is a Rus' chronicle from the 15th century^[1] associated with the Cathedral of St. Sophia, Novgorod.^{[citation needed]} It is scholarly abbreviated as S1.^[1] Its copies exist in two versions: Early Redaction (starshy izvod), which ends in 1418, and Later Redaction (mladshy izvod), with sporadic additions up to 1471, and up to 1508 in one of the copies.^{[citation needed]}

Together with the Novgorod Fourth Chronicle, it is believed that it is derived from a common source. Russian philologist Aleksey Shakhmatov tentatively called it the Novgorodsko-Sofiysky Svod (Novgorod-Sofia Corpus) and initially dated it to 1448,^[1] but later revised his opinion to the 1430s.^{[citation needed]} Some Russian philologists shared his opinion, while others attribute the common source to the 1418 Corpus of Photius, Metropolitan of Moscow.^{[citation needed]}