National Bank of Romania is a hive of activity throughout the working day. You might stand out a little without a suit, but it's still well worth swinging by to admire this notable landmark.
If you're going to National Bank of Romania in Bucharest City-Centre, make sure you leave time for some other sights too. After you've seen this corporate center of operations, Palace of the Parliament isn't far away and will keep you on the move for a while longer.