Leiden University acted as a magnet, attracting to the city many great scientists who often taught at the university. These included Einstein, Kamerling Onnes, de Sitter and Ehrenfest, but other prominent figures like the physician Von Siebold and Boerhaave made Leiden their home too. The scientists’ passion for collecting contributed to the many museums in Leiden. No other city in the Netherlands has so many fantastic museums within walking distance of each other. A rich and surprising range of nature, art, culture and science.