Located between Via Augusta and the provincial forum, Tarragona's circus was once used to hold horse and chariot races. An elongated structure measuring 325 by 115 metres, its original capacity has been estimated at 30,000 spectators. The complex was built in the 1st century. Unusually, it was located within the city limits and is thus endowed with several atypical architectural features. It is considered one of the best-preserved circuses in the West, although some of the original structure remains hidden under old 19th-century buildings.