Qaitbay Citadel 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 structure against invasions and played a significant role in protecting the city. The architecture of Qaitbay Citadel features robust stone walls and towers, showcasing Islamic military design. Today, it is a popular tourist attraction, offering visitors stunning views of the sea and the city, as well as a glimpse into Egypt's rich history.