https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13959592
A cross-section of the wax model of an equestrian statue of Louis XIV: showing the core all surrounded by broken bricks, with an illustration of the whole model encased in a plaster mould, covered with an iron net. Engraving by R. Bénard.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use