Windows, Corner Quoins, and Wall Bands
There couldn't be a better title for this. The homeowner was obviously a fan of windows, and lots of light. They made ample use of corner quoins on their multiple corners with a unique design.
In addition, the architect had the good sense to install a molding along the break between the first and second floor, which will go a long way in hiding any cracks which might occur at this weaker portion of the house. A cornice is used between the wall and soffit to sort of "cap off" the quoin corners.