Architekturzeichnen auf dem Königsplatz

Today I spent the day at Königsplatz in Munich sketching buildings, taking part at Florian Afflerbach's Workshop: Architekturzeichnen auf dem Königsplatz...
Florian is an architekt and one of my favorit urban sketcher, here is the link to his page if you don't know him yet: http://www.flaf.de/

I learnt many things about perspective.