https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14014081
The floor plan with scale of the Criminal Lunatic Asylum, Dundrum, Dublin, Ireland. Transfer lithograph by J.R. Jobbins, 1850, after J. Owen.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use