Brendan Zibaldone 9

Turning the corner is arguably the most important issue to deal with in architecture.  A building cannot always simply just turn the corner because of issues that it may face with the façade or columns or structure.  At the turn of a building the detailing is always critical.  When glass turns the corner, there are a few options.  You can have a corner mullion or you can put goop in to make a clean finish which is not necessarily always the best option.  In the Mass General Hospital, the corner is turned with a transition of materials, and the glass turns the corner with no mullion, but with goop.