Welcome to the Legends of Leiden Treasure Hunt by Leiden Ludens!

This hunt is all about the world-renowned alumni of Leiden University. As you travel through town, you will encounter several QR codes like the one you just scanned. They each represent 1 of 7 puzzles related to Leiden legends. You can do the entire tour in one go, or do a puzzle every day – whichever way you prefer! (The QR codes aren’t going anywhere).

Puzzle #2



The house in front of you is the former residence of Philipp Franz von Siebold (1796 -1866), a German physician and botanist. He is best known for his travels to Japan and the Dutch colonies of the East Indies. His collection of flora and fauna from these regions is why he is well known to this day, for he introduced many new species to the Western world. He was also the one that enabled the Dutch to start planting tea, for he had smuggled seeds out of Japan.

Originally, he kept his collections of foreign plant and animal species in Antwerp and Brussels. When in the 1830’s it became apparent that Belgium would split from the Netherlands, he moved his entire collection to Leiden. The Hortus Botanicus still holds many of the plants that Siebold brought over centuries ago. It is also because of Siebold that Leiden will forever have a connection to Japan, as is symbolised in the Japan Museum or ‘Sieboldhuis’.

Below you will find a traditional Japanese puzzle called a nonogram. It is up to you to mark the 20×20 grid according to the numbers on the side. Be sure to keep to the following rules:

  • Each number indicates a string of marked squares. A row that indicates [4 5] therefore means that somewhere on it is a string of 4 marked squares, and later on a string of 5 marked squares.
  • A square may only be marked if it fits both the horizontal and vertical indicating numbers.

Good luck!

(Use this pdf to help you, or take an editable screenshot with your phone).


What is depicted on the finished nonogram down below?

Type your answer behind the / in the URL. Example: pastatplay.com/youranswer.

All typed answers must consist of alphabetical symbols only (no spaces, numbers or punctuation marks).