A technical and technological examination was carried out on the polychromatic sculpture of St. George made of limestone by the outstanding Russian sculptor Vasily Yermolin. The sculpture was badly damaged, restored, and broken into pieces in the 20th century. A series of non-destructive investigations helped obtain information of how the artist had modelled the sculpture and established methods and techniques used in its design. It was the first time in restoration practice that a method of projective stereophotogrammetry was employed, which made it possible to compute the original form of the lost fragments using old archives photographs.