See

Arithmeum

The Arithmeum features a collection of historical mechanical calculating machines, which today comprises more than 1200 pieces and is the largest in the world. It features the history of calculators, from ancient abacuses and ropes with knots, until the modern day PC. The design of the building and its colourful art collection are an added bonus.

history

Address: Lennéstraße 2, 53113 Bonn
Getting there: Subway Stop: Universität / Markt Busses and Trams: Hauptbahnhof
Hours: Tue - Sun 11:00-18:00
Price: €3 / €2
Website: arithmeum.uni-bonn.de (opens in a new tab)

Directions Suggest a nearby place

Listing from Wikivoyage: Bonn, CC BY-SA 4.0.

Updated 28 Sept 2026. Something wrong? Tell us.

Close by

Eat
Mensa
The official student canteen offers several dishes, Essen 1 on the second floor is vegetarian. The food is not gourmet but okay for a canteen. The salad bar on the 3rd floor is quite good. Mensa is also open for non-students who pay a higher price (about €5 for Essen 1), but they do not always ask for your student identification if you look young. As of July 2021, the building is being replaced and a temporary canteen has been set up at the University main building.
Mon-Fri 11:30-14:00 & 17:30-19:00, Sat 11:30-14:00€3-6
Drink
Mojito
Small and popular cocktail bar, prices are moderate, they also have pizza and tapas. Very hot in the summer. Happy Hour 18:00-20:00: cocktails €6.90 and pizza from €6.50.
18-?
Eat
Kichererbse
Hole-in-the-wall place with different falafel wraps and fries.
See
Universität Bonn
University Main Building
It is in the former residential palace of the Archbishop and Kurfürst of Cologne, built by Enrico Zuccalli from 1697-1705. It stretches from Kaiserplatz to the Rhine (Alter Zoll) and crosses two streets (Stockenstraße and Adenauerallee), the gates are called Stockentor and Koblenzer Tor. The building looks impressive and beautiful from the outside, but could use a renovation inside. Feel free to walk in. Best view on the palace is from the Hofgarten side. The Hofgarten is a park directly in front of the palace and a place for students to meet and relax in the summer between and after lectures. During Bonn's times as capital, it saw all the major anti-government demonstrations.
Open now · closes 10 pm