Physics in Leiden has an enormously rich history. Many basic principles of modern physics were devised in Leiden, and famous scientists came to Leiden to consult with their peers. A tangible link to the past is the famous Ehrenfest Colloquium in which famous physicists talk to a wider audience about their work. At the end of the evening, the speaker gets to write their name on the wall to continue the line with illustrious predecessors such as Einstein, Bohr and Oppenheimer. This was first held in the home of physicist Paul Ehrenfest and mathematician Tatiana Afanasshewa and is now held at the Physics Institute.
