https://www.universiteitleiden.nl/en/news/2018/02/original-letters-einstein-and-lorentz-donated-to-museum-boerhaave
Original letters Einstein and Lorentz donated to museum Boerhaave - Leiden University
Museum Boerhaave amplifies its collection with original letters and pictures from Einstein and Lorentz. Professor by special appointment Dirk van Delft, also...
museum boerhaaveoriginalletterseinsteinlorentz