"Some 5000 photographs from the archives of Louis Robert have now been made available onlineThey are largely unidentified - interested persons are encouraged to add identifications.They include landscapes, monuments and, of course, inscriptions."
Plataforma portuguesa da European Students’ Association for Cultural Heritage (ESACH), uma iniciativa de cooperação europeia fundada por ocasião do Ano Europeu do Património Cultural 2018 – Sharing Heritage