Dietrich with violet hairs

Had a tour this morning in Weimar and saw another 3 Unesco sites. Classical Weimar Bauhaus andGoethe manuscripts. The tourguides name was Dietrich and Dietrich is hiding his gray hairs under a cover of violet. I liked it and will ask my wife Ditas if its o.k. for her if I do it to. Anyhow Dietrich knew a lot...