Saint Nestor the Chronicler (c. 1056 – c. 1114, in Kiev) was the reputed author of the Primary Chronicle, (the earliest East Slavic chronicle), Life of the Venerable Theodosius of the Kiev Caves, Life of the Holy Passion Bearers, Boris and Gleb, and of the so-called Reading.Nestor was a monk of the Monastery of the Caves in Kiev from 1073. The only other detail of his life that is reliably known is that he was commissioned with two other monks to find the relics of St.