There is a mosque of St. Sophia at Salonica, built, like its great sister at Constantinople, during the reign of Justinian, and with a history also marked by the wars of the Catholic and Orthodox Churches. But a fire of four years ago and an earthquake more recently have wrecked the place, so that it is no longer used. The Rotunda, now the Eski Metropoli Mosque, was built by Trajan, after the model, though on a smaller scale, of the Pantheon at Rome, and was dedicated by him to the rites of the mysterious Cabiri. It is circular, the dome unsupported by columns. The whole of the interior is richly ornamented with mosaics which seem to have belonged to the original temple, as nothing about them divulges adjustment at Christian hands. One of the best preserved models of ancient Greek architecture extant is said to be the Eski Djuma Mosque. In the porch are several Doric columns, and within the building is a double row of massive columns with Corinthian capitals. There are ‘The Church of the Twelve Apostles,’ and the mosque of St. Demetrius, whose shrine within is revered by Moslems and Christians alike. Between the Rotunda and the sea is the site of the Hippodrome, where Theodosius, the last of the Emperors who were sole masters of the whole Roman Empire, caused to be committed one of the bloodiest of massacres for which Salonica is famous. Although a zealous follower of Christianity, and commended by ancient writers as a prince blessed with every virtue, his moderation and clemency failed signally on this occasion. In order to chastise the people for a movement in favour of a charioteer very popular among them, and who had been arrested at his order, the inhabitants were assembled at the Hippodrome under the pretext of witnessing the races, and then barbarously massacred, without distinction of age or sex, to the number of seven thousand. At the end of the main street, which once formed part of the Egnatian Way, stands a triumphal arch generally supposed to have been raised in honour of Constantine, to celebrate the return from his victory over the Sarmatians. The supports are faced with white marble highly wrought, representing a battle between Roman troops and barbarians, and a triumphal entry into a city. The arch was repaired and plastered over some years ago in a painful manner, with no regard to conformity with the supports.