Patrick was born into a Christian family somewhere on the northwest coast of Britain in about 390. His grandfather had been a Christian priest and his father, Calpornius, a deacon. Calpornius was an important official in the late Roman imperial government of Britain. It was not unusual in this post-Constantinian period for such state officials to be in holy orders. When Patrick was about sixteen, he was captured by a band of Irish slave-raiders. He was carried off to Ireland and forced to serve as a shepherd. When he was about twenty-one, he escaped and returned to Britain, where he was educated as a Christian. He tells us that he took holy orders as both presbyter and bishop, although no particular see is known as his at this time. A vision then called him to return to Ireland. This he did about the year 431.