Cyril of Jerusalem was a fourth-century theologian and bishop who served the See of Jerusalem. Born around 313, he rose through the clerical ranks to become a bishop near the end of 350. His tenure was marked by significant political and religious instability, leading to several periods of exile due to conflicts with rival leaders like Acacius of Caesarea and various imperial policies. He is primarily remembered for his influential instructional writings, which detailed the liturgical practices and the spiritual preparation of catechumens during his era.