The Birth of Venus, with the face of Venus pixelated to prevent identification. This technique to hide identity is weak - screwing ones eyes up can reveal enough of the face to help with identification. The person may also be identifiable from the rest of their body or the surrounds or from information associated with the file.

In the unlikely event that you don't immediately recognise the subject, just drag and drop it onto Google Image Search and Google will tell you who it is. This shows that if the same or similar images are already online, then attempts to anonymise the image are futile. The Internet never forgets.