The Old City of Bern is the medieval city center of Bern, Switzerland. Built on a narrow hill surrounded on three sides by the Aare River, its compact layout has remained essentially unchanged since its construction during the 12th to the 15th century. Despite a major fire in 1405, after which much of the city was rebuilt in sandstone, and substantial construction efforts in the 18th century, Bern's old city has retained its medieval character.
The Old City is home to Switzerland's tallest cathedral as well as other churches, bridges and a large collection of Renaissance fountains. In addition to many historical buildings, the seats of the federal, cantonal and municipal government are also situated in the Old City. It is a UNESCO Cultural World Heritage Site since 1983 due to the compact and generally intact medieval core and is an excellent example of incorporating the modern world into a medieval city. Numerous buildings in the Old City have been designated as Swiss Cultural Properties of National Significance, as well as the entire Old City.