RomanMosaic depicting theatrical masks of Tragedy and Comedy, 2nd century CE, from Rome. (Palazzo Nuovo, Capitoline Museums)
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Original image by Carole Raddato. Uploaded by Carole Raddato, published on 28 February 2014 under the following license: Creative Commons: Attribution-ShareAlike. This license lets others remix, tweak, and build upon your work even for commercial reasons, as long as they credit you and license their new creations under the identical terms.