Kalabad Madrasah is the original name of the Bukhara Madrasah, which operated in the 9th-20th century and has not been preserved. In historical sources, it is called Arslon Khan Madrasah, Khan Madrasah, and Abdurahimhoja Madrasah. At the current time, it is called "Gulabad Madrasa" or "Kalabad Madrasa". Many famous historical people like Imom al-Bukhari have studied there. The Madrasah was built in 800-810 years after the arrival of Islam in Bukhara, and it was rebuilt 3 times in the following periods: 1st time in 1124, by Amir Kutvol, one of the scholars of Arslan Khan Muhammad (1102-1130); 2nd time during the reign of the Mongols, by Kayhotun's mother Suyurtuk tegina begum; 3rd time in 1609, during the reign of Uzbek Vali Muhammad (1605-1611), by Joyboriy Abdurahimkhoja. Kalabad Madrasah is one of the oldest educational institutions in the world. When the Kalabad madrasa was established, there was no educational institution in Europe. After 500 years, Abdurahimkhoja rebuilt the Kalabad Madrasah for the third time, at that time there was no higher educational institution in the world. The building of the Kalabad Madrasah rebuilt by Abdurahimkhoja was one of the largest Madrasahs in Bukhara in terms of size and scope. It was built in the traditional style of Turanian Madrasahs. It consisted of a mosque, a classroom, a library, toilets, and 79 or 100 rooms. The peculiarity of Madrasah architecture is that there are no flower bouquets installed on the corners of the walls on both sides of the main facade; there was a special porch under the roof arches, equal to the 2nd floor. Later, this style was used in Khorezm madrasahs; yards without corner sections, and edged estimates. The Madrasah operated until the 1920 Bukhara revolution. Its building was used as a prison in the 1930s, and later as a residence belonging to the municipal utility. It was destroyed in 1953. The bricks were used in the construction of Bukhara School No. 5, which was first named after K.Y. Voroshilov, and later after A.S. Makarenko. Currently, the courtyards are standing in place of the madrasa building. Names The name of the Kalabad Madrasah appears in the forms of Kalobot, Kalabon, and Kalonabad madrasa in several manuscripts copied from it. According to Sadri Zia, the original name of the madrasa is Kalabad. Between the 12th and 17th centuries, it was also known as the Madrasah of Arslan Khan. It is also