This collection of photo’s was donated by the grand duke Konstantin Romanov to the Panteleimonos monastery when he was visiting in 1881. Photos are dated 1867-1872. One of the oldest images of the monasteries. Starting with nr. 1 in rank Lavra ending with nr. 20 Konstamonitou.
This last picture is the then Russian skiti Profitou Eliou almost unrecognizable because in the current situation there are larger buildings and a large church and no windmill anymore. For a description of all the photos look here.
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Athos - Agios Oros 
Should this not be the Profitou Eliou skete? look here: http://www.pravoslavie.ru/foto/image735.htm
You are right. Did you find Konstamonitou in the pravoslavie collection?
no sorry, Konstamonitou was not photographed, probably the monastery was too much hidden in the Athos forrests!