Wikimedia Commons has media related to CC-BY-SA-4.0.
 | To place a file in this category, add the tag {{Cc-by-sa-4.0}} to the bottom of the file's description page. If you are not sure which category a file belongs to, consult the file copyright tag page. If this category is very large, please consider placing your file in a new or existing subcategory. Free files can be moved to the Wikimedia Commons. |