Theognostus was a 14th-century metropolitan who served as the head of the church in Kiev and all Rus'. Originally from Constantinople, he spent several years residing in Volodymyr before transferring his primary seat to Moscow. During his tenure, he played a crucial role in reconciling the interests of Novgorod and Moscow. He is remembered for his courageous stance against the Golden Horde, specifically his refusal to collect tribute for the Tatars and his efforts to safeguard church treasures from their seizure.