This is a featured picture on Wikimedia Commons (Featured pictures) and is considered one of the finest images. See its nomination here. This is a featured picture on the Polish language Wikipedia (Ilustracja na medal) and is considered one of the finest images. See its nomination here.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.