This is a unique photo from 1966 of Saint Paisios the Athonite with his Spiritual Father and Elder Papa Tychon (1884-1968), when they were visited at their Cell of the Honorable Cross by Joasaphite brothers. Saint Paisios is offering rainwater from the cistern of the Cell, while Hieromonk Tychon gives his blessing.
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See also:
The Cell of the Honorable Cross of Papa Tychon and Elder Paisios
Christmas With Papa Tychon
The Last Days of Elder Tychon the Athonite: A Blessed Repose