Abstract
This article presents the collections of Classical archaeologist Wilhelm Klein (1850-1924), kept in the Archive of the Charles University, which have recently become accessible to researchers. Klein worked at the German Charles-Ferdinand University (later German University) in 1886-1923.
Surviving correspondence demonstrates this Prague professor's involvement in the communication networks of contemporary Classical archaeologists and art collectors, and not only German and Austrian ones. Of special importance is his correspondence with the archaeologist Ludwig Pollak.
Appended at the end of the study are selected letters by Ludwig Pollak, Alphonse Van Branteghem, Eugénie Sellers Strong, Heinrich Alfred Schmid, and the mathematician Georg Pick.