The popularly known ‘Puente viejo’ (Old bridge) was built in the 1st century AD, is 331 metres high and has 16 arches which connect both shores of the Guadalquivir river. Declared an Asset of Cultural Interest, the Roman Bridge of Córdoba, the only one the city had until the 20th century, is part of the historical city centre, which was declared a World Heritage Site by the UNESCO in 1994.