Arithmeum
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    • Calculating Machine Videos
      • Archive
        • 44) The square root unit of the Friden SRW automatic square root mechanism
        • 43) The concept for Maurel's calculating machine from 1842
        • 42) The Piano Arithmomètre from the 1855 World Exhibition
        • 41) The adding machine of Thomas de Colmar
        • 40) The Walther DMKZ
        • 39) The Curta
        • 38) The carry of tens by Gottfried Wilhelm Leibniz 1677
        • 37) Insight into the restoration work at the Arithmeum
        • 36) The Atanasoff Berry Computer by John Atanasoff and Clifford Berry
        • 35) Cylindrical four-species adapting segment machine from Anton Braun
        • 34) Johann Jakob Sauter's adding machine from the late 18th century
        • 33) Calculator from the 17th century - Burattini or Morland?
        • 32) The adding machine by Charles Xavier Thomas from 1849
        • 31) The “Grasshopper” by George B. Grant from 1871
        • 30) The Centennial four-species calculating machine by George B. Grant
        • 29) Didier Roth's coplanar toothed disk adding machine from 1842
        • 28) Joseph Edmondson's circular stepped drum machine for all four basic arithmetic operations
        • 27) Coplanar toothed disk adding machine by Charles Stanhope from 1780
        • 26) “Matador” keyboard adding machine with crank 1906
        • 25) The single column key adding machine by Ferdinand Hebentanz from the year 1873
        • 24) Column adding machine by Moses and William Pullen from the year 1874
        • 23) „The Improved Adding Machine“ by Caroline Winter from 1859
        • 22) The arithmetic manipulator by Niccola Guinigi from 1858
        • 21) Tito Gonnella’s coplanar adding machine with tooth lock washers from the year 1859
        • 20) The automatically multiplying calculating machine by François Timoléon Maurel and Jean Jayet from the year 1846
        • 19) The “Z25” transistor computer by Konrad Zuse
        • 18) Arthur Burkhardt’s Arithmometer – the start of calculating machine production in Germany at the end of the 19th century
        • 17) Didier Roth’s circular calculating machine for automatic multiplication from 1841
        • 16) The mechanical calculator for all four arithmetical operations by Anton Braun (1727)
        • 15) “The Millionaire” – Calculating machine for direct multiplication by Otto Steiger
        • 14) The four-species calculating machine with a switching latch by Heyde and Büttner from the year 1883
        • 13) Four-species calculating machine with a switching latch mechanism by Friedrich Weiss from the year 1893
        • 12) Prototype of the four-species calculating machine with a switching latch mechanism by Curt Dietzschold from the year 1876
        • 11) Christel Hamann’s “Gauss-Mercedes” calculating machine with the unique stepped disc from the year 1909
        • 10) Jacob Auch's adding machine
        • 09) The "Hamann Manus" calculating machine
        • 08) Adding machine by Philipp Matthäus Hahn
        • 07) The patent model of Thomas de Colmar’s Arithmomètre from the year 1820
        • 06) Multiplication Instrument by Samuel Morland
        • 05) Johann Christoph Schuster's calculating machine
        • 04) Blaise Pascal's calculating machine
        • 03) The mechanical calculator for all four arithmetic operations by Axel Jacob Petersson
        • 02) The mechanical calculator for all four arithmetic operations by Johann Jakob Sauter
        • 01) The first mechanical calculator for all four arithmetic operations by Gottfried Wilhelm Leibniz
    • Calculating in olden times
      • The Beginnings of Reckoning Aids
      • 17th Century
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        • 1900-1909
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        • 1970-1979
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        • Calculating with maschines
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© Arithmeum

Workshops / Kinderprogramme

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Visitor information

 You can plan your visit to the Arithmeum here..

The Arithmeum is wheelchair accessible. We will also be happy to answer any questions you may have in advance. Wheelchair users can reserve a parking space in advance by phone.

You will find a map and parking facilities on the relevant websites.

Opening times at holidays

08.06.2025Whit Sunday - open
09.06.2025Whit Monday - open
19.06.2025Corpus Christi - open

ARITHMEUM

Lennéstr. 2, 53113 Bonn

Phone: +49 (0)228 73 87 90

Opening hours: Tuesday - Sunday 11:00 am - 06:00 pm

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