Constantin de Grimm (December 30, 1845 – April 19, 1896) also known as Baron de Grimm, was a Russian illustrator known internationally for his caricatures in publications such as the Vanity Fair (UK; under the pseudonym "Nemo"), Kladderadatsch (Germany), The Evening Telegram (US), and the German edition of Puck, of which he was founder. He served multiple times as president of the German Press Club. Born at the Winter Palace in Saint Petersburg, where his father taught the children of Czar Nicholas I, he relocated to Berlin in 1860, and later to Leipzig, where he contributed drawings to . He served in the German Army from 1867 to 1873 and received the Iron Cross for bravery during the Franco-Prussian War. He then returned to cartooning, becoming assistant editor of Kladderadatsch in 1873,