The city centre is not the entire city of Oslo, but this excursion gives you an opportunity to take a look at the major tourist attractions located in city centre and the historical district Kvadraturen.
During the tour you will see among others: the Oslo City Hall, the high street called Karl Johans gate, and historical buildings of the University. You will be able to view the Royal Palace and the Park, the Parliament Building, the Building of the National Theatre, and lots of other buildings and architectural styles.
The city centre is also a place where you can find various museums, shops, as well as cafes and restaurants. The guide will surely recommend the most attractive ones for you, while taking into account your interests.