Barcelona was originally called Barcino by the Carthaginians and later adopted by the Romans. The main languages spoken are Catalan and Spanish, and the population in 2008 was 1,615,908. The city's transportation system includes underground metro lines, taxis, buses, and trams. Some of Barcelona's most famous buildings, monuments, and sites include Casa Batlló, La Sagrada Familia church, Camp Nou stadium, Park Güell, and the Agbar Tower.