Originally on the site was a knoll with a house surrounded by a garden.
The Parliament of Norway Building was completed in 1866, ad in 1873 Oslo municipality bought the knoll.
[1] Wessels plass had a light rail station on the Briskeby Line of the Oslo Tramway.
It was served by lines 13 and 19, while it was active;[2] westbound trams skipped the station.
The square is also served by buses, and the Oslo Metro station Stortinget is not far away.