Ivan I of Moscow was a 14th-century Russian ruler who served as the Prince of Moscow from 1325 and the Grand Prince of Vladimir starting in 1331. Known as Kalita, he navigated complex relations with the Golden Horde to secure political dominance for his dynasty. By maintaining loyalty to the Mongol khans and collecting tribute from neighboring territories, he significantly increased the wealth and influence of Moscow. His strategic alliance with the Orthodox Church helped establish his capital as a primary spiritual center for the region.