Prof. Chiara Cecalupo (Rome/Madrid), a member of the RIGG, has been conducting a major research project on the rediscovery of the Roman catacombs in the 19th/20th century as a European cultural phenomenon. In this short video, for example, she talks about the catacomb postcards that were used for innovative advertising work at the time. Cecalupo also has her own website. 

Youtube Chiara Cecalupo