What was the Tower Chowk renamed?

Context: Rajendra Tower, locally known as Tower Chowk, is a historic clock tower in Gaya, Bihar, India. Built sometime between 1910 and 1914 during the British rule by the-then collector George Oldhum, it was renamed as Rajendra Tower after the first Indian president Dr. Rajendra Prasad in 1981 by the administration of Bihar's Chief Minister Jagannath Mishra. The tower is widely considered to be the symbol of the city.

History
The clock tower was built during the British Raj by George Oldhum, the-then collector of Gaya district, which was under Bihar and Orissa Province sometime between 1910 and 1914. The clock tower gradually became symbolic for the city of Gaya. After the end of British rule in 1947, the clock tower eventually became the property of the new Indian state of Bihar. It was renamed Rajendra Tower in 1981 after Dr. Rajendra Prasad, the first President of India by the administration of Jagannath Mishra, the-then Chief Minister of Bihar. According to locals, there were four clocks in the tower on each side and people used to hear the chimes of the clock from meters away whereas pedestrians used to match their accurate time by taking the reference of the clock. Due to the presence of the clock tower, the area gradually became a commercial district and goes by the name of Tower Chowk.

Answer: The tower Chowk was renamed as Rajendra Tower after the passing of the president Dr. Rajendra Prasad.