Why was the hagia Sophia rebuilt?

Claiming the Hagia Sophia was a major goal of the Ottomans. After conquering Constantinople, Mehmed II (the Ottoman Sultan) had the church converted into a mosque. Christian regalia was thrown out and, over time, traditional mosque features were added, including the four minarets (the tall pillars that are used for the multiple call to prayers each day). Today, the Hagia Sophia functions as a museum.