Khaldunia Madrasa in Tlemcen is a historic madrasa (Islamic school) located in the city of Tlemcen, western Algeria. The school was built by the Marinid Sultan, Abu al-Hasan Ali ibn Othman in 1347 AD, and it was called Al-Ubbad Madrasa. The name of the school changed to the Khaldunia Madrasa after the Islamic scholar Ibn Khaldun studied there. The madrasa is noted for its distinctive architectural style, making it a significant heritage and tourist landmark in Tlemcen.