Acts of the Martyrs – Acts of the Martyrs (Latin Acta Martyrum) are accounts of the suffering and death of a Christian martyr or group of martyrs. These accounts were collected and used in church liturgies from early times, as attested by Saint Augustine.

Acts of the Martyrs – Wikipedia

https://en.wikipedia.org/wiki/Acts_of_the_Martyrs

Acts of the Martyrs (Latin Acta Martyrum) are accounts of the suffering and death of a Christian martyr or group of martyrs. These accounts were collected and used in church liturgies from early times, as attested by Saint Augustine.[1]