https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13968689
The Porta Maggiore, Rome, incorporating part of the Claudian aqueduct (Aqua Claudia). Coloured aquatint with etching by M. Dubourg, 1820.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use