On the Bayeux Tapestry page [1] you can see that "there are no restrictions on dates or time slots for groups" and "For premium tours out-of-hours please contact traveltradebookings@britishmuseum.org"

It may have been arrranged by a business associate or a personal assistant, but I bet Thiel spent less time thinking about getting access to this tapestry than you reading through the article.

[1]https://www.britishmuseum.org/exhibitions/bayeux-tapestry#ti...