Simeon of Moscow

Simeon Ivanovich, nicknamed the Proud (7 September 1317 – 27 April 1353), was the eldest son of Ivan I Kalita, succeeding him as prince of Moscow and grand prince of Vladimir in 1340. He traveled to the Golden Horde and secured his investiture from Uzbeg Khan, outbidding his Tver and Suzdal rivals.

That year he also forced Novgorod to surrender Torzhok's tax revenues. He had married the Lithuanian princess Aigusta Anastasia in 1333. Simeon and his sons died of the Black Death in 1353.