August Krantz began his fossil shop in Freiburg, Germany in 1833. Through personal relationships with important scientists and collectors of the day, August Krantz amassed a sizable and diverse collection of fossils.
Friedrich Krantz (pictured - photo from the Krantz website) was well-known to fossil collectors and museums alike throughout the late eighteenth and early nineteenth century. He took over as head of the Krantz fossil and mineral firm in 1891. He sold specimens to many institutions including the Yale Peabody Museum, Harvard's Museum of Comparative Zoology, and the National Museum of Natural History (Smithsonian).
Dr. Krantz developed numerous special collections of fossils that were used around the world as teaching aids. Dr. Krantz and his employees traveled the world scouting out interesting localities and collecting fossils to replenish the firm's stores.
The Krantz mineral and fossil firm is still in business and can be found here. Today the firm carries a wide array of fossil material and fossil casts, and it is still used by personal collectors and large institutions.