A black and white photo of Max Planck. His arms are crossed and he is looking at the camera. Planck has a substantial mustache and his hair is receding. He is wearing a heavy, dark suit with a high-collared white shirt and a small black bowtie.
https://files.mastodon.social/media_attachments/files/111/579/479/797/114/184/original/ddd0ddddcf58e06e.jpeg