Starting with the Ming Dynasty, every city in China was fitted with a Drum Tower and a Bell Tower. In days of yore, the bell was rung to herald the dawn while the drum beat signalled dusk. Xi'an's drum and bell towers are from the Ming Dynasty; each tower is located within the city centre and acts as an intersection between the northern, western, eastern and southern points of the wall; head to the top of the drum tower for expansive views of the Muslim Quarter.