On 31 January 1868, a bright fireball was observed over Poland and tens of thousands of meteorites fell northeast of the town of Pułtusk. Immediately after the fall, locals from Pułtusk went out to collect the meteorites estimated to number between 70,000 to 180,000 individual specimens. Pieces ranged from a single gram to 9 kg. The Zambrzycki family who were local land owners traded the largest mass of Pułtusk specimens to various international museums. Study shows information form institutions including Bonn, Berlin, London, Vienna, Paris, Smithsonian (Washington) and Stockholm. This paper documents the world’s biggest collections of Pułtusk specimens, and the provenance of specimens listing the original dealers, collectors and scientist who provided specimens to the various museum and institutional collections at the time.