The Citadel of Qaitbay is a historic fortress located in Alexandria, Egypt. It was constructed by Sultan Qaitbay in the 15th century, specifically between 1477 and 1480. The fortress was built at the site of the ancient Pharos lighthouse, which had been destroyed by several earthquakes.

The Citadel of Qaitbay played a significant role in protecting Alexandria from attacks by foreign invaders, particularly the Ottomans. The fortress was constructed using the remains of the ancient Pharos Lighthouse, as well as stones from other ancient buildings, such as the nearby Alexandria Library.

The citadel comprises numerous structures, including a mosque, barracks, and a prison. The buildings are encircled by high walls and different fortified towers. The fortress also features a drawbridge that connects it to the mainland.

Today, the Citadel of Qaitbay is a popular tourist attraction in Alexandria, attracting visitors from all over the world. Visitors can explore the fortress and admire its impressive architecture, as well as enjoy stunning views of the Mediterranean Sea. The site is also a significant location for studying the history of Alexandria and its strategic importance to Egypt.