The Nizamiyya was a series of medieval Islamic schools established in the 11th century by the Persian vizier Nizam al-Mulk. These institutions aimed to provide higher education in various fields, including theology, law, and philosophy, and played a crucial role in the intellectual life of the Islamic world. The first and most famous Nizamiyya was founded in Baghdad, and others followed in cities like Nishapur and Damascus. These schools attracted prominent scholars, including the philosopher Al-Ghazali, and contributed significantly to the development of Islamic thought and education during the medieval period.