A Witness in Charcoal: The Life and Art of Johannes Matthaeus Koelz Johannes Matthaeus Koelz is a name that resonates with a particular weight, inextricably linked to the tumultuous history of 20th-century Germany. Born into an era poised on the brink of unprecedented conflict, his artistic journey became a profound and often harrowing chronicle of societal decay, moral crisis, and the desperate search for humanity amidst barbarity. W…