This is nice, thanks! I'm very new on here so this is timely. Just wanted to add that archive.org is a good source for different types of media in the PD or CC. Although with this and some other sites, you may often find some media added by a third party who may think something is in the public domain or creative commons, but really isn't. Always good to look around for a second opinion if you're not so sure. https://www.tineye.com/ is also a great tool that searches the web to help find the original source of an image that you upload. Hope these thoughts help!