Possibly the most striking building in the world is the Bank of China tower in Hong Kong. Its bold, iconic, and contentious. Hong Kong architecture is a battleground of positive and negative Feng Shui. The BoC tower has sharp angles that give out negative energy and push it out of the points (one of which faces the old British governors mansion, to which they build a pond in the way to deflect said energy after a death was blamed on the negative energy from the building).
The BoC tower:
The HSBC Building, with real working guns (I am reliably imformed by a HK resident) on the top left aimed directly at the Bank of China tower. Note those guns are NOT on the HSBC building image on HSBC bank notes:
Now see just how close they are. Try coming up with a convincing (hehe) argument that these buildings do not represent a HUGE piece of brand communication in the region, more so than most advertising ever does...: