Today's Google Doodle is a tribute to Brothers Grimm and their famous fairy tales.
Jacob (1785–1863) and Wilhelm Grimm (1786–1859) were German authors and researchers, known for collecting and popularizing European folk tales, including Cinderella, The Frog Prince, Hansel and Gretel.
As for the Doodle itself, it's one of the most elaborate we've seen, telling the entire story of the Red Riding Hood in a series of drawings.