Links:
[1] https://www.arquitectes.cat/ca/arxiu-coac-collabora-exposicio-virreina
[2] http://ajuntament.barcelona.cat/lavirreina/ca/exposicions/barcelona-la-metropoli-en-lera-de-la-fotografia-1860-2004
[3] https://www.arquitectes.cat/ca/javascript%3Ahistory.back%281%29