In the Netherlands astrolabes manufactured by Hartmann can be seen on display at the Museum Boerhaave in Leiden and the Utrecht University Museum in Utrecht. Other museums in Europe where some of Hartmann's are on display include the Kunsthistorisches Museum in Vienna, Musee de la Vie Wallone in Luttich, Belgium, Nationalmuseet in Copenhagen, Denmark, Museo di Storia della Scienza in Florence, Italy, and the St. Paul Stiftsgymnasium.
In the Netherlands, Hartmann's astrolabes are showcased at the Museum Boerhaave in Leiden and the Utrecht University Museum in Utrecht. Similar collections can be found in other European museums including the Kunsthistorisches Museum in Vienna, Musee de la Vie Wallone in Luttich, Belgium, Nationalmuseet in Copenhagen, Denmark, Museo di Storia della Scienza in Florence, Italy, and the St. Paul Stiftsgymnasium.