[330]

The need to build X came during the World War II to house the additional requirement at the time.
A location was chosen & the building was shaped according to the existing road network. However, location was blocking the view to a cemetery, hence a new location was chosen nearby. But the original shape was liked so much that was retained despite no constraints.
The name of this building is now synonymous with this shape. Identify it.

Show Answer
The Pentagon
The shape was a hit with the top brass for its uniqueness & hence was retained. The shape also has a callback to medieval forts.
Watch a Video to go into more detail.
gram