Musée International d'Horlogerie (MIH) is a museum located in La Chaux-de-Fonds, Switzerland, dedicated to horology, which is the study of time, timekeeping and timekeeping devices (primarily clocks and watches). The museum is owned and operated by the city of La Chaux-de-Fonds.
Historically the city of La Chaux-de-Fonds is considered one of the focal points of the Swiss watchmaking industries and the home of one of the countries famous watchmaking schools. The museum grew out of the study collection of the school, and is considered today among the broadest and most comprehensive watch and clock museums of the world. In addition to constantly changing temporary exhibits the museum features permanent displays from its vast collection of watches and clocks throughout history. While the collection is obviously strong on Swiss pieces it covers most places where timekeepers were made in any quantity.
To just get a general overview of the holdings will take at least an hour, a highlighs tour will be half a day, but it is easy to spend more time there. Visitors who make a trip to La Chaux-de-Fonds to see MIH will typically also want to visit the Musée d'Horlogerie du Locle a smaller horological museum in the neighboring town of Le Locle, which complements MIH.
Both Le Locle and its geographical twin town La Chaux-de-Fonds have now been recognised as an UNESCO World Heritage Site, for their horological and related cultural past.