Ludwig Rosenthal (2 July 1840, Fellheim, Bavaria - 23 December 1928, Munich) was a German antiquarian bookseller. His father, Joseph Rosenthal, was a lover of old books and odd bric-a-brac. Rosenthal apprenticed in Ellwangen, Baden-Württemberg before opening his business in Fellheim. In 1868, he moved to Munich and established himself at 16 Hildegardstrasse, almost immediately behind the Bavarian National Museum.[1]