The J. Paul Getty Museum
License, verbatimCC0
The J. Paul Getty Museum: image dedicated to the public domain under Creative Commons Zero (CC0), stated on the media record itself ('Rights for Media'), with download clearance.
London Stereoscopic and Photographic Company. [Arco di Settimio Severo/The Arch of Septimus Severns], 1855–1865. The J. Paul Getty Museum.