Old Aker Church
Old Aker Church () is a medieval era church located in Oslo, Norway. An active parish, the church is the oldest existing building in Oslo. The church is surrounded by Old Aker Cemetery.
Oslo Cathedral
Oslo Cathedral () — formerly Our Savior's Church () — is the main church for the Church of Norway Diocese of Oslo, as well as the parish church for downtown Oslo. The present building dates from 1694-1697.
The Norwegian Royal Family and the Norwegian Government use the Cathedral for public events. It was closed for renovation in August 2006 and re-opened with a festive high mass on 18 April 2010.