The Citadel of Alexander, also known as the Citadel of Algiers, is a historic fortress located in Algiers, the capital of Algeria. Built in the 16th century, it served as a military stronghold and a royal residence. The citadel features impressive architecture, including thick walls and strategic towers, reflecting the influence of Ottoman design. Today, the citadel is a popular tourist attraction, offering visitors a glimpse into the region's rich history. It provides panoramic views of the surrounding area and the Mediterranean Sea, making it a significant landmark in Algiers and a symbol of the city's heritage.