Klementinum | Tours of the Baroque Library and Astronomical Tower
Baroque library and tower with historic globes and centuries of unbroken weather records.
Location
About this audio guide
This guide to the Klementinum's astronomical tower in Prague explains how, from 1842, a beam of sunlight sliding across the floor and touching a north-south string marked solar noon to the second, signaled to the city by a flag waved from the gallery. It follows how, starting in 1891, a cannon in Letna Park across the river was aimed along that same meridian to fire the instant the flag moved, correcting Prague's pocket watches for some thirty-five years. Look up at the balcony where that flag once snapped.
This audio guide was created using AI.
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