Saint John of Damascus was born about the year 680 at Damascus, Syria into a Christian family. His father, Sergius Mansur, was a treasurer at the court of the caliph. John had also a foster brother, the orphaned child Cosmas (October 14), whom Sergius had taken into his own home. When the children were growing up, Sergius saw that they received a good education. At the Damascus slave market he ransomed the learned monk Cosmas