_Impost Capital, I._--This capital is found with the surface richly sculptured at S. Sergius. Capitals identical in form and decoration with the isolated capital of S. Sophia (Salz. Pl. xx., fig. 8) are found at Parenzo and in Jerusalem. The splendid examples of this type at S. Vitale, Ravenna, are well known; here the fretwork of sculpture is almost entirely relieved from the ground. We found an example absolutely similar at Constantinople. Mr. Ruskin’s “Lily Capital” which belongs to this group is found at S. Mark’s, at S. Vitale, at Parenzo, and at Alexandria. Another variety is covered all over with horizontal bands of zigzag fillets; an example rests in the Tchenli-Kiosk Museum, others are found at Athens, at Mistra, and a third now at S. Mark’s is figured in the _Stones of Venice_. The capitals at S. Sophia, Salonica, figured by Texier are probably the earliest of type I. to which an approximate date can be given; it was certainly in general use at the end of the fifth century. _Melon Form, II._--These magnificent eight-lobed capitals form the great order at S. Sergius, and are found at the church usually called Agia Theotokos. Similar capitals belong to the upper order at S. Vitale, and others are found at S. Mark’s. Some of the nave columns of S. Demetrius at Salonica have fine capitals of this type which although evidently derived from the last probably also originated in the fifth century. _Bowl Type, III._--These, the great capitals of S. Sophia, seem to have been especially designed for the metropolitan church: the beautiful palm foliage, however, with which they are sculptured is found again at Parenzo and on a capital in the Ravenna museum said to have been brought from Pomposa. The church at Parenzo was begun in 535. _Byzantine Ionic, IV._--These occur in their perfected form of block capital fully sculptured in S. Sergius and at the palace of Hormisdas in Constantinople, also in the upper order at S. Sophia, Salonica. Examples are also found at Venice. In their earlier form of transition from the “Ionic with a plain dosseret” an immense number are found in the subterranean structures of Constantinople. An example has been found in Chalcis.[359] _Bird and Basket, V._--S. Sophia furnishes two examples, but there is no proof that they originally belonged to the building. Another example is in Cairo. That at S. Clemente, Rome, is signed with the name of John Mercurius; Piranesi figures a capital of this kind from the Palazzo Mattei, bearing a monogram which is indecipherable in his plate. Period, end of fifth century and beginning of sixth.