The article concerns the origins and functioning of the Office of Ancient Archaeology at the Hosianum Secondary School in Braniewo in the second half of the 19th century. Its establishment was initiated in the early 1980s by a university lecturer, Wilhelm Weissbrodt. Initially, he wanted to obtain plaster casts of ancient works of art that would serve as teaching aids during classes. He gained wide support for creating the collections thanks to sharing them with educational institutions and private individuals. In 1892, the cast collection already consisted of approximately 260 items. In 1896, they started collecting original antique works. In addition to the collection of fine art, the facility also collected epigraphic artefacts, coins and seals. The collection's scientific base included professional scientific publications in the field of archaeology and ancient art.