Robert Byron wrote the book The Station, Athos: Treasures and Men in 1928. He made a lot of pictures which I found recently on the web. Here are some which I liked the most.
Simonos Petras with the aqueduct
Street in Karyes
From the rooftop of Gregoriou monastery
Gatehouse Vatopedi
Arsanas (boathouse) Dionysiou
Copyright: © Courtauld Institute of Art
More Byron pictures (60 in total) you will find here.
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Athos - Agios Oros 