Recently, there were open days in Cambridge. We managed to visit the Wren Library. It's a magnificent library that houses medieval manuscripts dating back to the 12th century.

Here are a few of the famous books that are kept there:
1. A copy of the first edition of Isaac Newton's "Philosophiae Naturalis Principia Mathematica," with handwritten notes related to the second edition.
2. Isaac Newton's notebook.
3. Handwritten notes by Robert Oppenheimer, describing the "Trinity" atomic bomb test in New Mexico, USA.

There was a long queue to get into the library. We had to wait for about an hour. You can even see it in one of the photos 😄

#photo