Complex sentence: For example, Norilsk's minaret tower, which is generally supposed to have a round shape, has a square base, because in such walls, the bricks do not freeze and they are more resistant to wind loads.
Split into simpler sentences: For example, Norilsk's minaret tower, which is generally supposed to have a round shape, has a square base. This is explained by that fact that in such walls, the bricks do not freeze and they are more resistant to wind loads.