Picture 47 of the Ambrosian Iliad - an illuminated manuscript of Homer's work dating to the 5th century CE) - showing Achilles making a sacrifice to Zeus in order to ensure Patroclus' safe return (from the Iliad book 16, 220-252).
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Original image by Unknown. Uploaded by Emma Groeneveld, published on 05 March 2018 under the following license: Public Domain. This item is in the public domain, and can be used, copied, and modified without any restrictions.