http://www.kunsthaus.ch/en/the-collection/conservation/examples-from-the-world-of-art-conservation/auguste-rodin/stage-1/drilling-of-the-base/bohrung2/?redirect_url=title%3DPr%20%25

Kunsthaus Zürich

Drilling of the base

The square steel bars are set in the base (Photo:  K. Mürer)
The square steel bars are set in the base
(Photo: K. Mürer)