S6E11: Drum Tower, Xi'an China. The Drum Tower was constructed in the year 1380, four years ahead of the Bell Tower in the early era of Ming Dynasty. It was renovated twice in 1699 and 1740. The tower is a two-storied rectangular structure with triple-eave glazed bricks and covering an area of 1,924 square meters. Contrary to the Bell Tower, its early function was to strike the drum at dusk to announce the end of the day.