At first, I misread my map and thought this was the convention center. 
By the time I figured out I was wrong, I was blocks away.  Throughout
the rest of the day, I kept thinking about returning, simply to find out
what the heck I photographed.  In the end never made it back.  Some
research from the hotel that night also failed.  But a bit more research
back at home, months later, solved this puzzle for me.  The photo is a
side view of a slice of an investment bank's building (CDP Capital).