Walk a couple of blocks inland to the Oslo Cathedral, the Domkirche (1697). Today it sits on one of the main squares of town along Karl Johan Gate, two blocks from the train station. Some items to notice are the bronze front doors, depicting the Sermon on the Mount, stained glass windows, carved pulpit and the highly decorated ceiling. Arcades behind the cathedral host a bazaar where artisans present their works, continuing a tradition from the Middle Ages.
The Stortorvet Square in front often hosts a colorful flower market, and across the street is Oslos largest and best department store, Glas Magasinet, which offers many goods of Norwegian design, and is especially noted for high-quality glass works. Stables that once circled this square have been converted into attractive shops and cafes. Yet another pedestrian mall, Torggata, extends three blocks north from here into another nice shopping area that could keep you busy for the rest of the evening.