Cacabey Astronomy Madrasa, one of the most important historical buildings in Kırşehir, was built in 1272 by the Governor of Kırşehir, Nureddin Cibril bin Cacabey, as a madrasah where mathematics, science and astronomy education was given. In addition to its unique architecture, Cacabey Astronomy Madrasa, which attracts attention with its inner colonnades, observation well, luminous light and observation tower, which symbolizes the planets in the solar system, is one of the first and perhaps the most important centers to provide astronomy education. The rocket-like colonnades found in three different parts of the madrasah, which is used as a mosque today, are considered as proof that the building was operating as an astronomy center.
Cacabey Astronomy Madrasa, which is one of the most important historical buildings in Kırşehir and located in the city center, was built in 1272 by the son of Anatolian Seljuk Sultan Kılıç Arslan II. It was built by Nureddin Cibril bin Cacabey, Governor of Kırşehir, during the Gıyaseddin Keyhüsrev period as a madrasah where mathematics, science and astronomy education was given. The first thing that draws attention in the madrasa is the colonnades on the exterior and in the corners. It is believed that the three columns in total show the firing and launching state of the rocket. The double-colored Crown Gate, one of the most beautiful examples of the Anatolian Seljuk Decoration Art, is another striking element of the building. Some of the shapes engraved on the Crown Gate have been the subject of discussion today. In particular, the comments made on the fact that the spheres hanging from the capitals of the colonnades at the entrance of the Crown Gate symbolize the moon and the sun, and that the circular shapes on the right and left lower corners of the pediment show the equatorial line and the axis inclination, brought the discussions to their climax.

Source:

https://kirsehir.ktb.gov.tr/TR-195632/cacabey-ve-gokbilim-medresesi.html