The helmet, which measures 22 centimeters in ... a grandson of Genghis Khan, who founded the Mongol Empire. Kublai twice attempted to invade Japan during the Kamakura Period (1185-1333).

a conflict between the Ottoman Empire and the Habsburg monarchy that raged from 1591 to 1606. Originally built in the 13th century as a fortress against Mongol invasions, Visegrád Citadel became ...