Peter Frankenfeld on the occasion of a TV appearance. A famous German rapper, designer and singer, that goes under the name of Cro, was born in Aalen and lived his early years here. Arts The Kunstverein Aalen was founded in 1983 as a non-profit art association and today is located in the Old Town Hall. The institution with more than 400 members focuses on solo and group exhibitions by international artists. It belongs to the Arbeitsgemeinschaft Deutscher Kunstvereine (ADKV), an umbrella organization for non-profit art associations. Museums and memorial sites Museums In the central district of Aalen, there are two museums: The “Aalen Limes Museum" (Limesmuseum Aalen) is located at the place of the largest Roman cavalry fort north of the Alps until about 200 AD. It opened in 1964. The museum exhibits numerous objects from the Roman era. The ruins of the cavalry fort located beside the museum is open to museum visitors. Every other year, a Roman festival is held in the area of the museum (see below). In the Geological-Paleontological Museum located in the historic town hall, there are more than 1500 fossils from the Swabian Jura, including ammonites, ichthyosaurs and corals, displayed. In the Waldhausen district the Heimatstüble museum of local history has an exhibition on agriculture and rural living. In the Wasseralfingen district, there are two more museums: The Museum Wasseralfingen comprises a local history exhibition and an art gallery including works of Hermann Plock, Helmut Schuster and Sieger Köder. Also, the stove plate collection of the Schwäbische Hüttenwerke steel mill is exhibited, with artists, modellers and the production sequence of a cast plate from design to final product being presented. Memorial sites There is memorial stone at the Schillerlinde tree above Wasseralfingen's ore pit dedicated to four prisoners of the subcamp of Natzweiler-Struthof concentration camp killed there. Also in Wasseralfingen, in the cemetery a memorial with the Polish inscription "To the victims of Hitler" which commemorates the deceased forced labourers buried there. In 1954, on the Schillerhöhe hill the town erected a bell tower as a memorial to Aalen's victims of both world wars and to the displacement of ethnic Germans. The tower was planned by Emil Leo, the bell was endowed by Carl Schneider. The tower is open on request. Every evening at 18:45 (before 2003: at 19:45), the memorial's bell rings. Buildings Churches The town centre is dominated by the Evangelical-Lutheran St.