[1] He is remembered above all for his work together with Otto Haslund, illustrating Johan Krohn's book Peters Jul [2] [3] [4] Born in Copenhagen, Denmark, he was the son of sculptor Frederik Christopher Krohn (1806–1883) and Sophie Susanne Købke (1807–1853).
[5] [6] Krohn studied painting at the Royal Danish Academy of Fine Arts under Wilhelm Marstrand, Jørgen Roed and P.C.
In 1871, together with Otto Haslund and Julius Lange, he traveled to Germany and the Netherlands to familiarize himself with the latest reproduction techniques.
In the mid-1870s, he became a member of the Danish artists colony in Rome, associating with Thorvald Bindesbøll, Hans Friis, Axel Helsted, Carl Thomsen and Kristian Zahrtmann.
He was artistic director of the porcelain factory Bing & Grøndahl from 1885 to 1892 and, from 1893 until his death, head of the Danish Museum of Art & Design (Kunstindustrimuseet).