A 100-year-old watercolour of Munich’s old city hall is expected to fetch at least €50,000 at auction this weekend, not so much for its artistic value as for the signature in the bottom left corner: “A. Hitler”.

A 100-year-old watercolour of Munich’s old city hall is expected to fetch at least €50,000 at auction this weekend, not so much for its artistic value as for the signature in the bottom left corner: “A. Hitler”.