Strängnäs Cathedral (Swedish: Strängnäs domkyrka) is a Lutheran cathedral church in Strängnäs, Sweden, since the Protestant Reformation the seat of the Church of Sweden Diocese of Strängnäs. Architecture. Construction of the cathedral began in about 1260 with inaugurated in 1291; additions were created during the 1300s and 1400s. In 1330 the core church itself was completed and it was later supplemented during the Middle Ages with a sacristy, towers and lateral choirs. The present characteristic Baroque-style tower hood was built in 1723.
https://en.wikipedia.org/wiki/Str%C3%A4ngn%C3%A4s_Cathedral