Statue of Ludovisi Ares. Source: http://commons.wikimedia.org/wiki/File:Ares_MK1888.png
This image comes from the 4th edition of Meyers Konversationslexikon (1885-90), it is therefore Public Domain.
Uploaded to Wikimedia Commons by user Maksim. Converted to SVG by Warszawianka.
Took Johnny Automatic's benfing child scan and conversion, converted it back to a bitmap, erased the border and background, then converted it back to vector.
Source: http://commons.wikimedia.org/wiki/File:Demeter_MKL1888.png This image comes from the 4th edition of Meyers Konversationslexikon (1885-90). The copyrights have expired and this image is in the public domain. Uploaded to Wikimedia Commons by user Bibi Saint-Pol. Vectorized by Warszawianka.
Drawing of Hades with Cerberus. Source: http://commons.wikimedia.org/wiki/File:Hades.png This image comes from the 4th edition of Meyers Konversationslexikon (1885-90); it is therefore Public Domain. Uploaded to Wikimedia Commons by user Michelmfb. Vectorized by Warszawianka.