Giovan Battista Langetti has works in the collection Bavarian State Painting Collections
References
Wittkower, Rudolf (1993). Art and Architecture in Italy, 1600-1750. 1980. Penguin Books. p. 346. ISBN 9780140561166.
Bryan, Michael (1889).  Walter Armstrong and Robert Edmund Graves (ed.). Dictionary of Painters and Engravers, Biographical and Critical. Vol. II L-Z). London: George Bell and Sons. p. 18. Retrieved 11 November 2013.(Original from Fogg Library, Digitized May 18, 2007)
holds works in the collection