His speciality was the reign of
Ivan III (1462–1505) and 15th-century Russia. In evaluating the overall significance of Ivan III, Fennell concludes that his reign was "militarily glorious and economically sound," and especially points to his territorial annexations and his centralized control over local rulers. However, Fennell adds that his reign was also "a period of cultural depression and spiritual barrenness. Freedom was stamped out within the Russian lands. By his bigoted anti-Catholicism Ivan brought down the curtain between Russia and the west. For the sake of territorial aggrandizement he deprived his country of the fruits of Western learning and civilization." Martin Dimnik said of Fennell, "His achievements are unrivaled in the West, and almost so in the
Soviet Union and Russia". ==Bibliography==