The Plaza de Toros ("bullring") in Ronda, Málaga is one of the oldest operational bullrings in Spain.The arena has a diameter of 66 metres (217 ft), surrounded by a passage formed by two rings of stone. There are two layers of seating, each with five raised rows and 136 pillars that make up 68 arches. The Royal Box has a sloping roof covered in Arabic tiles. Construction of the bullring started in 1779 and finished in 1785. It stands on the west edge of Ronda, about two blocks from Puente Nuevo and the El Tajo canyon. The design is attributed to the architect Martín de Aldehuela.

http://en.wikipedia.org/wiki/Plaza_de_Toros_de_Ronda