This is a file from the Wikimedia Commons and may be used by other projects. Information from its description page there is shown below. Commons is a freely licensed media file repository.
Summary
DescriptionKilling Fields 20170222-1.jpg
Deutsch: In der Nähe der kambodschanischen Hauptstadt Phnom Penh wurden Ende der 1970er Jahre etwa 20 000 Menschen mit Äxten, Stangen oder Dreschflegeln erschlagen. Mehr als 5000 Schädel der Opfer wurden in einem Turm (Stupa) aufgebahrt.
English: Near the Cambodian capital Phnom Penh, about 20,000 people were killed with axes, poles or threshing flails in the late 1970s. More than 5000 skulls of the victims were placed in a tower (stupa).
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.