Ghiyasuddin A'zam Shah (Bengali: গিয়াসউদ্দীন আজম শাহ, Persian: غیاثالدین اعظم شاه) was the third Sultan of Bengal and the Ilyas Shahi dynasty. He was one of the most prominent medieval Bengali sultans. He established diplomatic relations with the Ming Empire of China, pursued cultural contacts with leading thinkers in Persia and conquered Assam.