The first trams in Buenos Aires began operating in 1863 in what quickly became a vast network of tramways with the city being known as the "City of Trams" for having the highest tramway-to-population ratio in the world.[1][2][3] In the 1920s, Buenos Aires had 875 km (544 mi) of tramways and 99 tram lines using 3000 carriages running throughout the city.[2][3] By 1963, the vast majority of the network began to be dismantled, though some minor tram services continue in the city today.