Development of Mechanical Clocks in Europe

Timeline

1. 1334–1336Padua · VenetoUnder Visconti rule, Milan installed documented public mechanical clocks around 1335 at churches such as Sant'Eustorgio, an early firm attestation of mechanical clocks in Italian city bell towers. The Padua civic clock, designed by Jacopo Dondi and installed in 1344 on the tower of the Palazzo del Podestà, came slightly later than this entry's main 1330s window. These clocks used weight-driven gear trains regulated by an escapement to strike the hours day and night.
2. 1336–1338England · EnglandMechanical clock technology spread northward in Europe at the same time; Richard of Wallingford, abbot of St Albans in England, designed and built a complex astronomical mechanical clock in the late 1320s, combining gear trains with an astrolabe and displays of the sun and moon's motions, reflecting monastic scholars' exploration of precision machinery.
3. 1338–1340Western European cities · Western EuropeBy the mid-14th century, mechanical clocks in cathedrals and town halls appeared successively in cities of northern Italy, France, and parts of England, unifying worship and markets through bell ringing. The claim that it was 'widespread in Western Europe by the late 1330s' is overstated; diffusion continued into the second half of the 14th century.