Osaka Castle is one of Japan's most famous landmarks and a symbol of Osaka's historical significance. Originally built in 1583 by Toyotomi Hideyoshi, a renowned feudal lord and samurai, it played a major role in the unification of Japan during the sixteenth century. The castle stands on a plot of land roughly one square kilometer in size, surrounded by secondary citadels, gates, turrets, impressive stone walls, and moats. Its architecture is a fine representation of Japan's feudal period, and the main tower of Osaka Castle is adorned with gold leaf that highlights its importance and grandeur. Inside the castle tower, there is a museum that chronicles the history of the castle and the city of Osaka, with many historical and cultural artifacts on display. Despite being destroyed and rebuilt several times over the centuries, the current structure, which dates back to 1931, maintains the traditional design while incorporating modern materials.