The acquisition, preservation and study of zoological specimens has been a constant in the history of the Royal Seminary. Since that first Cabinet of Natural History Vergara founded in 1773, through the Cabinet of Natural History Guipuzcoano Institute (and its projected Museum of Natural Things of the Province), to the last and important Natural History Museum created in the late XIX, all periods in the history of this institution had witnessed efforts to create and maintain zoological collections, for better understanding of this scientific discipline. The historical collection of zoologie of the Royal Seminary has come down to us: antique taxidermy, animal skeletons, shells of molluscs (Indo-Pacific species mainly), models of animal anatomy, vertebrate specimens preserved in liquid, a small entomological collection and other invertebrates preserved in dry (corals) and alcohol (echinoderms). This is a collection of research and investigation typical of XIX century, composed of about 1,000 specimens, among which should be noted, by their numerical and scientific taxidermy which was of the Natural History Museum Royal Seminary. We have selected some pecimens  to be exhibited in the future.

The pieces selected to be part of the future permanent exhibition of the Museum are important by its age (pieces of XIX century; 1867 is the date more antique) for his cosmopolitan background (including a good representation of animals from Eurasia to  America, Africa and Oceania), for the important scientific history of many of them (specimens of relevant scientists of XIX century, specimensn purchased in the best Paris-specialized stores of nineteenth century-) well as zoological rarity of some items (the whale skeleton and Lemur necklace, for example).

In short, it is a collection of Zoology typical of his time, very valious both by the characteristics of specimens and by the important history and science that reflect their uniqueness in the Basque Country.