The event has been cancelled due to the COVID-19 pandemic! One of the early versions of the Eötvös pendulum, the “Paris pendulum” made in 1898, was exhibited in the ELTE University Library and Archives in the interactive exhibition „Under the the spell of accuracy – The Life and Work of Loránd Eötvös”. After closing our library, when the street is quiet, it is worth watching the pendulum during operation. We look forward to seeing you at our guided tours! Participation is free, but pre-registration is required. You can register at the e-mail address email@example.com.