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
The current Oslo Cathedral is the third cathedral in Oslo, Norway. The first, Hallvards Cathedral, was built by King Sigurd I of Norway in the first half of the 12th century, and was located by the Old Bishop's Palace in Oslo, some east of today's cathedral.