You may not upload any of the following to polybooru:
- Off-topic content - Pornography (distinct from artistic nudity and historical erotica) - Images from academic papers, journals and theses (These are usually copyrighted) - Memes - Third-party edits that alter the historical or didatic purpose of the image - AI-generated, upscaled or altered images - NSFL content - Historical objects post-Industrial revolution - Fake artifacts - Photoshopped images
