The Curved Minaret draws attention with its resemblance to the world-famous Leaning Tower of Pisa in Italy. The Eğri Minaret, located on Nevşehir Street in the city center of Aksaray, is one of the important historical monuments that have survived from the Seljuk Period. While the minaret is called the Eğri Minaret due to its curvature, it is also known as the Red Minaret due to the red bricks.
Eğri Minaret, one of the 13th century Seljuk works, was built in 1221-1236 by Gıyaseddin Keyhüsrev I, the father of Seljuk Sultan Alaaddin Keykubat. The Eğri Minaret, which has a balcony and 92 steps, is 30.6 meters high.

Source:

https://www.kulturportali.gov.tr/turkiye/aksaray/gezilecekyer/egri-minare-kizil-minare