- Advertisement -Every year, there’s one day that all Leiden residents look forward to, Leidens Ontzet (Relief of Leiden). Lodewijk van Nassau, younger brother of Willem van Oranje. Willem van Oranje proposed to establish the first university in the Netherlands as a reward for defeating the Spanish. Eat some foodYou may be asking yourself: is Dutch food even a thing? Feature Image: Image: Paul Arps/Wikimedia Commons/CC2.0