Chamberí is a district of Madrid, Spain. It is further subdivided into six neighborhoods (Gaztambide, Arapiles, Trafalgar, Almagro, Ríos Rosas and Vallehermoso). The district junta is headquartered at the plaza de Chamberí. The current urban outline was born as part of the Ensanche plan drafted by Carlos María de Castro (approved in 1860).