

In the summer of 1939, Ludwig Wittgenstein travelled to New York City to sort out financial matters together with his brother Paul. At that time, he stayed at the Shelton Hotel at 525 Lexington Avenue, which is now used as student accommodation.
Sources:
- Monk, R. (1991). Ludwig Wittgenstein: The Duty of Genius. Vintage.
- Ludwig Wittgenstein: Gesamtbriefwechsel/Complete Correspondence (2nd Release). Innsbruck Electronic Edition 2013, InteLex.