1070
A bishop’s seat. A diocese is established at Oslo and work begins on St Hallvard’s Cathedral, named for the local saint who was killed defending a pregnant woman and is on the city’s seal.
A bishop’s seat. A diocese is established at Oslo and work begins on St Hallvard’s Cathedral, named for the local saint who was killed defending a pregnant woman and is on the city’s seal.
See the full timeline or read the history of Oslo.