Max Planck presents Albert Einstein with the Max Planck medal of the German Physical Society, June 28, 1929 in Berlin.

Landesmuseum für Technik und Arbeit in Mannheim, "Brüche-Nachlass" (estate of Ernst Brüche?)

Max Planck Medal

The entire image is used.

The image is not low resolution, but is not of the highest resolution required for commercial use.

Max Planck Medal, Max Planck, Albert Einstein, Germany, Culture of Germany, German inventors and discoverers, Photon polarization, Science and technology in Germany and any other articles in which it is deemed by WP:Consensus to be relevant. It is a faithful digitalization of a unique historic image, and is used to illustrate exchange of the inaugural award of the Max Planck Medal between two of the pre-eminent physicists of the 20th century, thus communicating the notable history of the award in a way that is not possible with words. No one to date appears to have publicly claimed to be the author (photographer) of this image in conjunction with its publication. This image has descended to the present through the families, friends, and colleagues of Planck, Einstein, and Niels Bohr at a minimum. This photograph is presumed to be in the public domain in every jurisdiction, because it appears that no one has publicly claimed authorship in conjunction with the image's original publication. If anyone is in possession of evidence that the author (i.e., the original photographer, original fiduciary or original sole licensee of the original photograph) had publicly claimed authorship of the original publication(s) of this image, please make a note on this page, or notify the Wikimedia Foundation of any claims to original authorship.

The image depicts a non-reproducible historic event, and no explicit "freely licensed" alternative exists or can be created. This image has, to date, no author that has claimed exclusive copyright, and has descended to the present through the families, friends, and colleagues of Planck, Einstein, and Niels Bohr at a minimum. Quite probably it is in the public domain in every jurisdiction, because no one has publicly claimed authorship in conjunction with the image's publication.

The Landesmuseum für Technik und Arbeit in Mannheim requests that if the picture is used in print to please send them a reprint of your work.
See also Emilio Segrè Visual Archives. "Einstein bequeathed his estate--which includes rights to the use of his image, or celebrity rights--to the Hebrew University of Jerusalem,..."