The 1977 Atocha massacre was an attack by right-wing extremists in the center of Madrid on 24 January 1977, which saw the assassination of five labor activists from the Communist Party of Spain (PCE) and the workers' federation Comisiones Obreras (CC.OO). The act occurred within the wider context of far-right reaction to Spain's transition to constitutional democracy following the death of dictator Francisco Franco. Intended to provoke a violent left-wing response that would provide legitimacy for a subsequent right-wing counter coup d'état, the massacre had an immediate opposite effect, generating mass popular revulsion of the far-right and accelerating the legalization of the long-banned Communist Party.

Line 1 of the Madrid Metro is an underground metro line running from Pinar de Chamartín in the north to Valdecarros in the southeast, via Sol. Today it has 33 stations and spans 24 km (14.9 mi) from end to end.

The Teatro Variedades was a famous Colosseum in the city of Madrid, Spain, in the 19th century. Erected in 1847, the theater was located at 40 Magdalena Street. It was known once as one of the most entertaining theatres for the not-so-demanding general public. There, the Boufee genre, the political revue and other minor theatrical genres were inventively exploited. The theater was consumed by flames in a fire on 29 January 1888, resulting in its demolition because of its wooden foundations.

Antón Martín is a station on Line 1 of the Madrid Metro. It is located in Fare Zone A and has been open to the public since 26 December 1921. The station is named for Antón Martín (1500–1553) of the Knights Hospitaller, who founded the nearby Hospital de San Juan de Dios.

El abrazo or the Monument to the Atocha lawyers is an instance of public art in Madrid, Spain. A three-dimensional rendering of Juan Genovés' painting of the same name, the sculpture serves as a memorial to the victims of the 1977 Atocha massacre, committed by the far-right.