this is a gateway to search other sites (Google images, YouTube, Flickr..etc) for content that is openly licensed
you can search thirteen different sites through this search engine including , but only one at a time, you can't search across sites.
The Commons houses all of the media that is used in Wikipedia, as well as additional public domain and freely-licensed educational media.
The Commons does not provide an advanced search, everything on the site is either public domain or CC licensed. You will have to check with each individual item you find to view the licensing.
is a gateway to European cultural assets, through this one site you can search for artworks, cultural items, archival collections from participating institutions all around Europe. This site is a gateway, and once you have selected the items you want you will be redirected to the website of the institution that owns the item, and often these sites will not have English translations. To find an item with the Creative Commons licension you prefer -
Once you type in your initial search on the main page, you will have a list of filters on the left hand side of the page
Use the "Can I use it?" and "By Copyright" filters to narrow down your results