Torre do Relógio, also known as Torre Ameada, was rebuilt during D. Dinis reign. It's said that this clock tower was constructed by the moors with the objective of signaling enemies.
After the first 32 steps, there is a privileged view of the region. On the top of the tower, it's possible to observe the clock, the bell and the time marker.
Source: Visit Viseu Dão Lafões