The Roman circus was the site of horse-drawn chariot races, usually between two-horse chariots, known as bigae, or four horse chariots, known as quadrigae. Tarragona’s circus is one of the best conserved in the entire Western world, despite the fact that much of the structure remains hidden under a series of 19th century buildings. Currently, the eastern side can be visited, including the decorative façade and stands, the Sant Hermenegild vault, and those on Carrer Enrajolat. Another section has been uncovered in Plaça Sedassos and Carrer Ferrers, and several vaults can also still be seen along Carrer Trinquet Vell and in Plaça de la Font.