June 8, 2024 – December 31, 2026
Um drei Ecken gedacht – Rechenschieber und Vermessung
Historical special-purpose slide rules and ornate surveying instruments show how fields, towers and hills were measured in the past.

University of Bonn museum on the history of calculation, with a world-class collection of historical calculating machines plus chip design and art.
June 8, 2024 – December 31, 2026
Historical special-purpose slide rules and ornate surveying instruments show how fields, towers and hills were measured in the past.
October 11, 2025 – December 31, 2026
Retrospective of the Swiss artist of geometric-constructive art, with works from the 1970s to the present.
October 11, 2025 – February 28, 2027
The calculating machines of French inventor Léon Bollée, including his direct-multiplication machine of 1889, on loan from Le Mans.
June 13, 2026 – June 20, 2027
Precious mathematical and scientific instruments of the Renaissance from a private collection, originally made for princely cabinets of curiosities.
The Arithmeum is based on the collection of Bonn mathematician Bernhard Korte, who began collecting mechanical calculating machines as a student – precisely in the 1970s, when electronics were displacing mechanics. From this core grew a collection that today numbers more than 10,000 objects, including calculating machines, historical computers, slide rules and an extensive library on the history of mathematics.
The museum is a central institution of the University of Bonn and shares a new building on Lennéstraße with the Research Institute for Discrete Mathematics. The building, with its delicate steel-and-glass facade, is meant to make the openness of science visible; the permanent exhibition "Rechnen einst und heute" (Calculating Then and Now) has been on view since September 1999.
The tour runs chronologically from counting stones, abacus and counting table through replicas and originals of the great inventors of calculating machines to industrial mass production, the beginnings of data processing and the Enigma. A separate section bridges the gap to the institute's current research on microchip design. The program is complemented by special exhibitions on the history of instruments, presentations of geometric-constructive art from the museum's own collection and the concert series "concerto discreto".
| Adults | €3 |
|---|---|
| Reduced | €2School students, university students, trainees |
| Children & teens | €2Children free until they start school, then student price |
| Seniors | –No senior discount listed |
| Visitors with disabilities | freecompanion free · People with severe disabilities and their necessary companions free |
| Students & apprentices | €2 |
| Groups (7+ people) | –Groups of 7 to a maximum of 60 people only with a guided tour or by appointment. Guided tour (60–90 min.) €25 plus admission per person; no tour fee for school classes. |
| Families | €8 |
Public guided tours on weekends without a tour fee (admission only). Children's programs, workshops and children's birthday parties €25 program fee plus €6 per participant.
According to Bonn's accessibility portal, wheelchair-accessible with elevators; no information on the official website.
Great for kids & families
| Family ticket | €8 |
|---|
Rally sets through the permanent exhibition for children from preschool age; workshops from preschool to upper secondary school; children's birthday parties (€25 program fee plus €6 per child).
Universität/Markt
Subway to Universität/Markt; train, tram and buses to Bonn Hauptbahnhof.
Parking available
No parking directly at the museum; the museum refers visitors to the parking garages in the city center. Wheelchair users can reserve a parking space in advance by phone.
Shop with catalogs, books and chip-design items.
The museum hasn’t published any information on this – please ask the museum directly.
| Guided tours | yes · approx. 60 min |
|---|---|
| School programs | yes |
| Good to know | Free public guided tours on weekends (permanent exhibition Sundays at 11:00, special exhibitions Saturday and Sunday afternoons). Group tours and workshops for daycare through upper secondary school and for adults by advance booking (Mon–Fri 9:00–18:00, tel. 0228 738790 or arithmeum@or.uni-bonn.de). Regular Monday concerts in the "concerto discreto" series. Tours last 60–90 minutes, as requested. |





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