The usual understanding of Gaius in Rom 16.23 as a ‘host’ of the Corinthian Christ group (or the host of travellers to Corinth) is fraught with several difficulties: it implausibly renders ξένος as ‘host’ rather than the much more common ‘guest’; it fails to explain why a ‘host’ would have been named so far down Paul's list of those sending greetings; and it fails to explain why Paul refers to this person by his praenomen instead of the more common cognomen. Gaius is not a Corinthian ‘host’, but a Roman ‘guest’ of the Christ group in Corinth. This also implies that Gaius is not a wealthy patron of the Christ group at Corinth.