ABSTRACT The Natural History Museum Vienna is one of the most important museums of natural history in the world. Its collections date back to the year 1750, when the Emperor Franz Stephan of Lorraine (Franz I. Stephan) purchased (from Italy) what was then the largest and most famous collection of natural history specimens. The meteorite collection of the Natural History Museum in Vienna, Austria, has the longest history of all comparable collections in the world. In the second half of the eighteenth century, soon after the foundation of the Imperial Natural History Cabinet in 1750, the Viennese curators began to collect meteorites. Although the first curators neither believed in the extraterrestrial origin nor accepted—in several cases—the written and witnessed histories of these allegedly “heavenly” stone and iron masses, they preserved them in the Natural History collection. Among the first acquisitions were the historical important meteorites Hraschina (Agram), Tabor, Krasnojarsk (Pallas iron), and Eichstädt. These and other well-documented specimens from the Vienna collection were, for example, used by E.F.F. Chladni for his seminal treatises of 1794 and 1819, respectively. The central figure in the early history of the collection is Carl von Schreibers (1775–1852). After the fall of the Stannern meteorite in 1808, he availed himself of every opportunity to acquire meteorite specimens. His continued interest in meteorites laid the foundation for the Vienna collection to be of the historical and scientific importance it is today. Due to the efforts of Schreibers, who also is regarded as founder of meteoritic science in Vienna, and his successors, the Vienna collection became the largest and most extensive in the course of the nineteenth century. In terms of the geological and paleontological collections, early expeditions and collecting campaigns were mainly targeting exotic animals and plants, while paleontological objects were welcome but subordinate. It was only in the early nineteenth century that the paleontological collections were—literally and figuratively speaking—systematically enlarged. Internationalization and diversification became the focus of the collection strategy. The paleontology collections at the Vienna museum also became important in the Darwinian view of evolution.

Abstract Based on existing classifications of caves that often involve descriptive terms, a classification is presented that is based purely on genetic processes. An attribute key is developed that allows the classification of caves by means of cave maps, photographs and reports. This method is applied to a dataset of 6007 caves in a study area in eastern Austria. The area comprises diverse geological units of the Eastern Alps and the southern Bohemian Massif. A total of 94% of the caves could be classified with the surprising result that mechanical weathering and erosion caves are almost as common as solution caves even though the vast majority of caves are developed in carbonate rocks. Field checks confirmed the result and showed that the error is acceptable. The classified caves can also be used as indicator of natural phenomena like gravitational mass movements or vulnerable karst areas by decision-makers non-specialized in cave genesis.