Crossing Odos Dragatsaniou, in the end stands the attractive medieval church of Agioi Theodoroi (St. Theodore), built on the site of a church founded in the ninth century, but in its present form dating from between 1050 and 1075. This small cruciform church with its high narrow dome, multiple roofs that lend it an air of rhythmic grace, narrow mullioned windows and decorated central door surmounted by arches, is a precious gem of eleventh century Byzantine architecture.
The earliest form of Byzantine churches was that of the basilica, a long rectangle divided by two or four ranges of columns into three or five naves. Later, during the 11th and 12th centuries, the plan changed to that of a Greek cross within a square, dominated by a dome constructed in brick and often combined with one or more subsidiary domes. The exterior walls consist of square-cut stone with thin brick surrounds and are enriched by bands of decoration, carving and the use of color. Few of these churches were large. Apart from St. Theodore, typical examples are the churches of Kapnikarea and St. Eleutherios.
The glory of the Byzantine church lies not so much in the architecture as to the ethereal beauty of its mosaics or frescoes. From the center of the principal dome Christ looks down upon the faithful and below Him are the Apostles. The Virgin appears in the half dome, while around the sanctuary are symbolic figures and emblems connected with the Eucharist. On the West wall opposite the chancel is the Last Judgement. Colored marble and similar material in the lower walls add to the resplendent beauty of the interior.
The liturgy of the Greek Orthodox Church requires separation of the altar from the laity. The altar is placed in a chancel screened from the congregation by the iconostasis, i.e. the screen dividing the sanctuary from the church proper. This is adorned with pictures of Christ, the Virgin, and Saints, and generally has three doors, the curtains of which are lowered while Mass is being celebrated. The chancel is flanked by the Prothesis, where the bread and wine for the Eucharist are prepared, and by the Diakonikon, or vestry.
In St. Theodore one can also notice the influence of the East on Byzantine art, which was prominent in the period from the mid-9th to mid-11th centuries, when Byzantine artists used a variety of Oriental motifs in their designs. It is probable that the design of pseudo-kufic characters (the script perfected during the 7th century by calligraphers in the city of Kafa, in present-day Iraq) that decorate the terracotta panel below the windows of the facade was inspired by the work of Arab craftsmen.