Little is known about his early life. Juvenal was born in the late 4th century and was consecrated Bishop of Jerusalem in 422. In 428/9 he consecrated the
Laura of Euthymius, located on the road between Jerusalem and Jericho, and supplied it with
presbyters and
deacons. Euthymius and the monks of Palestine would go on to play an important role in the
Chalcedonian controversy. In 431, Juvenal sided with Cyril against
Nestorius at the
First Council of Ephesus. After the council he began to exert jurisdictional oversight across all three provinces of
Roman Palestine; Juvenal wanted to make Jerusalem into a
Metropolitan See but
Cyril of Alexandria and
Pope Leo I opposed the separation of Jerusalem from Cæsarea and
Antioch. Juvenal was one of the leaders of the
Second Council of Ephesus in 449, being the first to sign it as an ally of
Dioscorus. This led to his name being removed from the diptychs of the churches that rejected the council. However he changed his stance at the Council of Chalcedon convened later, condemning the previous council. In 451, the
Fourth Ecumenical Council met in the city of
Chalcedon and condemned the
Monophysite heresy, which taught that the human nature in Christ was totally absorbed by the divine nature. Juvenal was among those who condemned the heresy and affirmed the doctrine of the
union of two natures in Jesus Christ, the divine and the human, without separation and without mixture. Theodosius reportedly filled Jerusalem with blood, then raised a military company to punish other rivals in the region like
Severianus, Bishop of Scythopolis, whom he brutally executed in 452 or 453. Imperial troops restored Juvenal in 453, and he served in peace until his death in 458. == Theological contribution ==