The Museo Nazionale di Ravenna, founded in 1885, is housed in the former monastery of San Vitale. The museum holds rich and varied collections of archaeological artifacts and applied arts, the earliest nucleus of which dates back to the eighteenth-century collections of the Camaldolese monks of Classe. As regards Indigenous American artifacts, the Museo Nazionale di Ravenna preserves a collection of more than six hundred arrow points from the Potomac Valley near Washington, D.C. (USA), and three engraved gourds whose American provenance is likely but not certain.