Despite its purely Baroque appearance and its name from the 15th century Swedish king Gustav I, this church was built only in 1906.
Built in the 18th century to replace a older wooden church in the same place. Its cemetery is where René Descartes was first buried in 1650, before his remains were moved to France. There is now only a memroial to him inside the church.
St. John is a neo-Gothic church built in 1890 on an old parish site from the 13th century. The architect drew inspiration from Cologne Cathedral.