This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Selfportrait with Moustache and Beard by Theo van Doesburg AB. cm Utrecht Centraal Museum nl creator Theo van Doesburg other versions PDArt Selfportraits by Theo van Doesburg Portrait drawings by Theo van Doesburg Drawings in the Centraal Museum