Martyrdom
According to the accounts of his life, Peter was a Muslim Tatar who embraced Orthodox Christianity in the period following Ivan IV's 1552 conquest of Kazan. The reasons behind his conversion and baptism are not specifically known.
His martyrdom is placed in 1555, when Russian forces temporarily withdrew from the city and an armed uprising broke out among the Tatar population. Peter was tortured over several days by members of his own family, who attempted to compel him to return to Islam. His persecutors addressed him by his former Muslim name in a further effort to induce apostasy, but he remained steadfast, repeatedly confessing 'I am a Christian.' He died under this persecution and was buried in Kazan.