Casa de la Misericordia - The House of Mercy

Next to the main door of the the OAC of the Ciutat Vella District of Barcelona in Plaça de Vicenç Martorell you can see two holes in the wall of different sizes.

The larger of the two is circular and covered in wood whilst the smaller is just a simple slot in the wall.

These two holes are one of the few remaining vestiges of La Casa de la Misericòrdia - the House of Mercy, which was a religious institution run by nuns in the 19th century.