Stockholm, Sweden. Stockholm Stadhuset, Stockholm City Hall. A red brick tower, built in 1911, took 12 years to complete. It has a total of 8 million red bricks and 19 million mosaic tiles, which are quite magnificent. The largest hall is called Blue Hall, where the Nobel Prize dinner is held. Although it is called Blue Hall, it is actually red. The organ on the top of the hall has 10270 sound tubes, and the hall can be used for 700 people to enjoy the banquet. Up to the 106-meter tower, you can get a panoramic view of Stockholm.