The Citadel of Qaitbay is a historic fortress located on the Mediterranean coast in Alexandria, Egypt. Built in the 15th century by Sultan Qaitbay, it was constructed on the site of the ancient Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World. The citadel served as a defensive stronghold against invasions and played a significant role in protecting the city. The architecture of the citadel features robust stone walls and towers, showcasing Islamic military design. Today, the Citadel of Qaitbay is a popular tourist attraction, offering visitors stunning views of the sea and a glimpse into Egypt's rich history.