St John of Damascus (December 4) was declared a Doctor of the Church by Leo XIII in 1883

Iohannes Damascenus, or Yuḥannā Al Demashqi, also known as the “golden speaker” (literally “streaming with a gold”) for his ability to write and argue, was a Syrian monk who made a crucial difference to the Church and without whom Eastern Orthodoxy might not have retained its attachment and beauty.

Born in 675 or 676 in the Syrian capital into a prominent family, the Mansour, his grandfather Mansur Bin Sargun had surrended the city to the Muslims, but Damascus continued to be effectively run by a Christian civil service for hundreds of years, and John’s father Sergius served the caliphs, as did John after him. One of the great polymaths of the age, John had particular skill in law, theology and music, writing hymns that are still used in Orthodox liturgy. Revered across Christendom, the Orthodox Church refers to him as “the last of the Fathers” while the Catholic Church regards him as a Doctor of the Church, in particular, the Doctor of the Assumption because of his writings on that subject.

Syria had been the land where followers of Jesus first called themselves Christian and it was steeped in the Hellenistic culture in which the faith developed.

His learned father had insisted that John “learn not only the books of the Muslims, but those of the Greeks as well” and he grew up at least partly speaking Greek, and earning a Hellenic education. His tutor may have been Cosmas, a Sicilian Greek kidnapped by Arabs, although the biography is sketchy, and Cosmas probably also taught John’s childhood friend, St Cosmas of Maiuma,

John grew up to become a major opponent of the iconoclasts, then gaining ground in the court of Constantinople. In 726 Emperor Leo III ordered that images should not be venerated, against the wishes of the patriarch, and St John undertook a defence of holy images, gaining a reputation as a writer and influencing the Second Council of Nicaea.

John left Damascus in his 40s to become a monk, partly due to the increasingly Islamic atmosphere of Damascus, and he died in Palestine on December 4, 749, at the Mar Saba monastery outside Jerusalem.

He was declared a Doctor of the Church by Leo XIII in 1883.