Wow, it's so easy. It takes only 2 minutes to create this nice drawing of the photo below. As always it's a matter of the right software :-)
(Akvis Sketch 2.1)
The photo shows the Bode Museum, one of the museums on the Museumsinsel (museum island). It had been closed for six years of reconstruction before it reopened last October. This and the other museums on the island are a must for a visitor of Berlin. Many years ago I went there and saw an Egyptian mummy (this is the only thing from the exhibition which I remember, shame on me :-).
Wikipedia: English - German