Once Cyprian had become the unchallenged head of the Church, he placed even more emphasis on the themes of unity and continuity. His
By the mid-fifteenth century Church texts characterized Dmitrii Donskoi as the hero of Kulikovo and stressed his role as the prince who had gathered an army drawn from many of the lands of Rus, to oppose the Tatars. They also likened his grandson Vasilii II to Vladimir; the latter had introduced Christianity to Rus and had subsequently been canonized as a saint, while the former was depicted as the protector of the Orthodox faith for rejecting a union with the Roman Church (1439) and supporting the Russian prelates’ decision (1448) to name their own metropolitan without confirmation by the patriarch of Constantinople.
The deep concern of the Church to preserve the territorial and, after 1439, the spiritual integrity of the metropolitanate enhanced the prestige of the Muscovite princes, whose political policies were compatible with the causes of the Church. The Church, while pursuing and justifying its own ecclesiastical goals, furnished the Daniilovichi with ideological concepts that legitimized their rule.
By 1425 Muscovy had strengthened both its material and ideological foundations. The new domestic sources of legitimacy, however, remained secondary as long as the Golden Horde continued to be powerful and to support the Daniilovichi. Despite a devastating attack by Timur (Tamerlane) on Sarai and its other market centres in 1395, the horde was able to maintain its dominance over the Rus princes, to collect tribute from them, and even to launch a major campaign and besiege Moscow (1408). Lithuania similarly exerted a strong influence over the lands of Rus. It incorporated Smolensk (1395) and became increasingly involved in Novgorod, Tver, and Riazan. Vasilii I, who had married the daughter of Vitovt, the grand prince of Lithuania, not only met Lithuania’s expansion with relative passivity, but named Vitovt one of the guardians of his son, Vasilii II.
Shortly after Vasilii I died in 1425, however, the balance of power in the region shifted. Muscovy’s neighbours, Lithuania and the Golden Horde, had imposed internal order and external limits on the Rus lands. But in 1430 the Lithuanian grand prince died, and his realm fell into political disarray. At virtually the same time the Golden Horde, which had never fully recovered from the economic disruptions caused by Timur, began to disintegrate. During the next two decades the Golden Horde split into four divisions: the khanate of Kazan on the mid-Volga, the Crimean khanate, the khanate of Astrakhan, and the remnant core—the Great Horde.
Once Muscovy’s neighbours had weakened, the Daniilovichi reverted to intradynastic warfare. At issue, as during the Kievan Rus era, was a principle of succession. In the second half of the fourteenth century the princes of Moscow (in the absence of living brothers and eligible cousins) had regularly named their eldest sons as their heirs. Although this practice established a vertical pattern of succession, it was adopted as a matter of necessity, not as a deliberate plan to replace the traditional lateral succession system. When Vasilii I died, however, he left not only his son Vasilii II, but four brothers. As long as his son’s guardians (who included Vitovt of Lithuania and Metropolitan Photius) were alive, no one quarrelled with his succession.