Early Christian art and architecture in the context of "Christian art"

The depiction of Jesus in pictorial form dates back to early Christian art and architecture, as aniconism in Christianity was rejected within the ante-Nicene period. It took several centuries to reach a conventional standardized form for his physical appearance, which has subsequently remained largely stable since that time. Most images of Jesus have in common a number of traits which are now almost universally associated with Jesus, although variants are seen.

The conventional image of a fully bearded Jesus with long hair emerged around AD 300, but did not become established until the 6th century in Eastern Christianity, and much later in the West. It has always had the advantage of being easily recognizable, and distinguishing Jesus from other figures shown around him, which the use of a cruciform halo also achieves. Earlier images were much more varied.

The history of Christianity begins with Jesus, an itinerant Jewish preacher and teacher, who was crucified in Jerusalem c. AD 30–33. His followers proclaimed that he was the incarnation of God and had risen from the dead. In the two millennia since, Christianity has spread across the world, becoming the world's largest religion with over two billion adherents worldwide.

Initially, Christianity was a mostly urban grassroots movement. Its religious text was written in the first century. A formal church government developed, and it grew to over a million adherents by the third century. Constantine the Great issued the Edict of Milan legalizing it in 315. Christian art, architecture, and literature blossomed during the fourth century, but competing theological doctrines led to divisions. The Nicene Creed of 325, the Nestorian schism, the Church of the East and Oriental Orthodoxy resulted. While the Western Roman Empire ended in 476, its successor states and its eastern compatriot—the Byzantine Empire—remained Christian.

The Tempietto del Bramante is a martyrium designed by Donato Bramante to commemorate the site traditionally regarded as the location of Saint Peter’s crucifixion. The small, freestanding chapel was commissioned by Ferdinand II of Aragon and Isabella I of Castile and was completed c. 1502 for the cloister of San Pietro in Montorio in Rome, Italy. The structure is considered a masterpiece of High Renaissance architecture, with scholars and architects noting Bramante’s harmonious proportions and his symbolic adaptation of Classical and early Christian architectural elements.

Aniconism is the absence of material representations of the natural and supernatural world in various cultures. Most denominations of Christianity have not generally practiced aniconism, or the avoidance or prohibition of these types of images, even dating back to early Christian art and architecture. Those in the faith have generally had an active tradition of making artwork and Christian media; depicting God, Jesus, The Holy Spirit, religious figures including saints and prophets, and other aspects of theology like The Trinity and Manus Dei.

There have however been periods of aniconism in Christian history, notably during the controversy of the Byzantine iconoclasm of the eighth century, and following the Protestant Reformation of the 16th century, when Calvinism in particular rejected all images in churches, and this practice continues today in some Reformed (Calvinist) churches, as well as some forms of fundamentalist Christianity. The Catholic Church has always defended the use of sacred images in churches, shrines, and homes, encouraging their veneration but condemning anyone who would worship them as if they were gods themselves.

A crux gemmata (Latin for jewelled cross) is a form of cross typical of Early Christian and Early Medieval art, where the cross, or at least its front side, is principally decorated with jewels. In an actual cross, rather than a painted image of one, the reverse side often has engraved images of the Crucifixion of Jesus or other subjects.

Examples in metalwork are the Cross of Justin II (6th century, in the Vatican Museums), the 'crumpled cross' in the Staffordshire Hoard (8th century), the Cross of Lothair (10th century, Aachen Cathedral Treasury), the Iberian Cross of the Angels (808) and Victory Cross (908), and the Cross of Cong (1120s?, National Museum of Ireland).