[1] The street urbanised as slums were built along what it formerly was the Carretera de Francia ("Road of France").

[2] In the context of the early 20th-century, the impoverished area became the epicentre of the "rebel and combative" Madrid despite its peripheral status and, during the 1917 general strike, seditious pamphlets were handed over in the street.

[3] In the 2010s, a huge number of betting shops controversially proliferated in the street,[4][5] leading up to protests against gambling.

[1] Stretching along a total length of roughly 4 kilometres,[4] it passes through the neighborhoods of Arapiles, Trafalgar, Vallehermoso and Ríos Rosas in the Chamberí District.

One of the chief commercial axis of the city, the 2.81 km stretch passing through Tetuán constitutes the spine of the district.