Torre del Rellotge, Defensive tower in Olesa de Montserrat, Spain.

The Torre del Rellotge is a square, unfinished bell tower of irregular stone with red sandstone quoins at the corners, standing in the old town of Olesa de Montserrat. Its south face has a door at the base, two small windows and a clock, while the other faces are blind. An octagonal body at the top holds a forged-iron element with the two bells of the municipal clock.

The tower originated as part of the Castle of Olesa during medieval times. In the early 16th century, it was raised to its current height and transformed into a functioning clock tower with bells for the town.

The name comes from the municipal clock and its two bells, housed in a forged-iron frame on an octagonal top. The tower is often mistaken for the church bell tower; the real one was destroyed in the Spanish Civil War, and the parish now uses a small espadanya over the rectory.

The tower rises on the south side of Plaça Nova, at the start of Carrer de l'Església, with the rectory alongside and the parish church of Santa Maria attached on the west. Its south and east faces stand free, so the clock and the two small windows are best seen from the square; the other sides are hemmed in by adjoining buildings.

Between the 1700s and early 1900s, the structure served as the town jail before becoming known primarily as a clock tower. This dual purpose reveals how rural defensive structures often took on multiple roles over time.