Named in honor of Reverend Sergij Radonezhskij (c. 1321–1391), prominent figure in the Russian Church, highly respected and honored person who was considered in Russia a protector of learners and learning. He actively supported Moscow Prince Dmitrij Donskoj in the policy of the consolidation of Russian principalities and in the national struggle for liberation against the Tartar-Mongolian yoke. (M 22502) _ _.