There were several external factors which at this time favoured the rise of the Serbian state. Byzantium and the Greek Empire, to which the Emperor Manuel Comnenus had by 1168 restored some measure of its former greatness and splendour, regaining temporary control, after a long war with Hungary, even over Dalmatia, Croatia, and Bosnia, after this date began definitively to decline, and after the troublous times of the fourth crusade (1204), when for sixty years a Latin empire was established on the Bosphorus, never again recovered as a Christian state the position in the Balkan peninsula which it had so long enjoyed. Bulgaria, too, after the meteoric glory of its second empire under the Asen dynasty (1186-1258), quite went to pieces, the eastern and northern parts falling under Tartar, the southern under Greek influence, while the western districts fell to Serbia. In the north, on the other hand, Hungary was becoming a dangerous and ambitious neighbour. During the thirteenth century, it is true, the attention of the Magyars was diverted by the irruption into and devastation of their country by their unwelcome kinsmen from Asia, the Tartars, who wrought great havoc and even penetrated as far as the Adriatic coast. Nevertheless Hungary was always a menace to Serbia; Croatia, Slavonia, and the interior of Dalmatia, all purely Serb territories, belonged to the Hungarian crown, and Bosnia was under the supremacy of the Magyars, though nominally independent. The objects of the Magyars were twofold—to attain the hegemony of the Balkan peninsula by conquering all the still independent Serb territories, and to bring the peninsula within the pale of Rome. They were not successful in either of these objects, partly because their wars with the Serbian rulers always failed to reach a decision, partly because their plans conflicted with those of the powerful Venetian republic. The relations between Venice and Serbia were always most cordial, as their ambitions did not clash; those of Venice were not continental, while those of Serbia were never maritime. The semi-independent Slavonic city-republic of Ragusa (called Dubrovnik in Serbian) played a very important part throughout this period. It was under Venetian supremacy, but was self-governing and had a large fleet of its own. It was the great place of exchange between Serbia and western Europe, and was really the meeting-place of East and West. Its relations with Serbia were by no means always peaceful; it was a Naboth’s vineyard for the rulers and people of the inland kingdom, and it was never incorporated within their dominions. Ragusa and the other cities of the Dalmatian coast were the home during the Middle Ages of a flourishing school of Serbian literature, which was inspired by that of Italy. The influence of Italian civilization and of the Italian Church was naturally strong in the Serb province, much of which was under Venetian rule; the reason for this was that communication by sea with