Wittgenstein settled in Britain in the 1920s. He applied for British naturalization in 1938, and was granted it a year later. His Oath of Allegiance, shown below, completed the formal process.


For more details, including Wittgenstein’s application for Certificate of Naturalization, information on the time he spent working in Cambridge, vacation destinations, and the testimony of character referees including John Maynard Keynes, go here. For an overview of Jewish settlement in Britain, go here.