Bab Mansour el Aleuj, situated in Meknes, Morocco, is a historic gate built in the late 17th and early 18th centuries as the main ceremonial entrance to the Kasbah of Sultan Moulay Isma'il. The gate, designed by the architect Mansour al-Alj, features intricate tilework, carved wood, and marble columns taken from the ancient Roman site of Volubilis. While the gate is no longer used for ceremonial purposes, it remains a significant landmark and a testament to Moroccan architectural heritage.