Find location #7!
Well done, you solved puzzle #6! In 1849 Thorbecke formed his first cabinet and became chair of the Council of Ministers. In today’s terms, he would be prime minister (or ‘premier’ in Dutch). He went on to serve two more terms in the nineteenth century.
As a reward, you get a symbol for the end solution – remember it well!
And here is a photo clue for the next location of the treasure hunt, puzzle #7: