In the 16th century, the tower now known as Ivanovskaya was called Tainitskaya. It received this name due to an underground passage about 70 meters long that led to the Upa River. This passage was reinforced with an oak log structure and served to supply the kremlin with water during a siege. In the 17th century, the structure deteriorated and collapsed, burying the passage, which was decided not to restore as it was no longer needed. Later, the tower was renamed Preobrazhenskaya in honor of the monastery built near the kremlin in memory of the warriors who fell in battle against the army of Khan Devlet Gerai on June 21 and 23, 1552, while defending Tula. Ultimately, the tower was named Ivanovskaya, due to the nearby Ivanov Gates.