The Torres de Quart is one of the two remaining gates of the old Valencia city wall. It was built between 1441 and 1493 to the site of 11th century Moorish gate.
Over the subsequent centuries, the city of València was not placed under siege. While the walls of the city were in disrepair, the towers continued to be anchor points in the defense of the city. In the 17th century, the tower was also being used as a women's prison, with many inmates being prostitutes. In 1808, during the Battle of Valencia in the Peninsular War, cannonballs and bullets from French troops damaged the gate. The holes were preserved during future restorations as a memory of the occasion.
The gate was declared a national monument in 1931. It has undergone several restorations and now serves as a tourist attraction.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.