The Citadel of Aleppo is a historic fortress located in the city of Aleppo, Syria. It is one of the oldest and largest castles in the world, with origins dating back to the 3rd millennium BC. The citadel has served various purposes throughout history, including as a royal palace and military stronghold. Its strategic position on a hill offers a panoramic view of the surrounding area. The citadel features impressive architecture, including massive stone walls and a series of towers. It has been influenced by various cultures, including the Romans, Byzantines, and Ottomans. Today, the Citadel of Aleppo is a UNESCO World Heritage Site, attracting visitors interested in its rich history and architectural significance.