City in a city

This is maybe the first thing that cough my attention when I arrived in Oslo.
What is Oslo City? It’s a shopping center. That’s it. As simple as that. What’s amazing about it? First of all the communication as a city. I’ve been there and it is surprisingly big and it has something that reminds me of a city, more like a citadel.
The second thing is how they managed to express this idea of a city. More exactly a city in a city. If you watch the logo carefully you will see the letter C from the word CITY integrates the letter O, the second O from OSLO. To get the picture you can think of it as Vatican.