The world's richest person tweeted a picture https://twitter.com/elonmusk/status/1543050489050402816 where he can be seen standing next to the pope, captioning it: "Honored to meet @pontifex yesterday."
Musk's four teenage boys are also pictured, but not his 18-year-old transgender daughter who, on June 20 sought to change her name and sever ties with him. Musk has a total of eight children.
The purpose and location of Musk's meeting with the pope were not immediately clear.
Last month, Musk said there were "still a few unresolved matters" on the deal to buy Twitter, including the number of spam users on the system and the coming together of the debt portion of the deal.
(Reporting by Rachna Dhanrajani in Bengaluru; Editing by Lincoln Feast.)