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. In the 1920s, Buenos Aires had 875 km of tramways and 99 tram lines using 3000 carriages running throughout the city. By 1963, the vast majority of the network began to be dismantled, though some minor tram services continue in the city today.