The Citadel of Herat (, Pashto سکندرۍ کلا), also known as the Citadel of Alexander, and locally known as Qala Iktyaruddin (), is located in the center of Herat in Afghanistan. It dates back to 330 BC, when Alexander the Great and his army arrived to what is now Afghanistan after the Battle of Gaugamela. Many empires have used it as a headquarters in the last 2,000 years, and was destroyed and rebuilt many times over the centuries.