St. Peter's Church in Zürich has a clock face 8.7 metres across, the largest in Europe, beating Big Ben's by a measurable margin despite a tower roughly thirty metres shorter. The four dials have been marking Zürich's time since the late 1200s, starting with a single face on the riverside, expanding century by century, until a computer took over in 1996.

The church itself is older. The original structure dates to 857, probably built by King Ludwig, and was rebuilt twice in the following four centuries. Today, it is the only Baroque church in the old town, its nave blending grandeur with traces of Gothic and Romanesque detail. For over six centuries, night watchmen used its four-windowed tower to scan the city for fires.

VoiceMap's self-guided audio tours bring St. Peter's into Zürich's longer story, tracing its clock's evolution from a single medieval dial to the city's enduring timekeeper.