La cárcel de Carabanchel, Europe’s biggest and most notorious prison until its closure in 1998, was built under General Franco’s watch. Between 1940 and 1944, every wall was raised and every metal door was fitted by the same prisoners who would eventually do their time here. None dared lay a brick loosely or leave a screw untightened – this prison was a star-shaped fortress, and nobody was escaping.

We’re in a surreal time in Madrid, somewhere between crisis and post-crisis. With the economy in motion again, the city’s charming madrileño hum is being shattered by the crash-bang-drill-beep of construction work and, for a brief moment, a peculiar phenomenon is appearing.