Mariefred is a locality situated in Strängnäs Municipality, Södermanland County, Sweden with 7,121 inhabitants in 2023. The name is derived from that of the former Carthusian monastery in the city, Mariefred Charterhouse, and means "Peace of Mary" (the previous name being Gripsholm). It lies roughly 50 kilometres west of Stockholm by lake Mälaren. Mariefred is, despite its small population, for historical reasons often still referred to as a city. Statistics Sweden, however, only counts localities with more than 10,000 inhabitants as cities. Gripsholm Castle is located in the town.
https://en.wikipedia.org/wiki/Mariefred