The Arch of Constantine in Rome, built in c. 315 CE to commemorate the Roman emperor's victory over Maxentius in 312 CE. It is the largest surviving example of a Roman Triumphal Arch.
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Original image by Mary Harrsch. Uploaded by Mark Cartwright, published on 30 December 2012 under the following license: Creative Commons: Attribution-NonCommercial-ShareAlike. This license lets others remix, tweak, and build upon this content non-commercially, as long as they credit the author and license their new creations under the identical terms.