2 Corinthians

 It is not known how many letters Paul wrote to Corinth, or they to him.  1 Corinthians, written from Ephesus, was not his first letter to them (1 Cor.5:9).  It is believed to have been written in the spring of AD 54, making it among the earliest NT writings.  2 Corinthians was written about a year later from Macedonia (2 Cor.2:13, 7:5-7; 8:1; 9:1-4), before his third and last visit to them.  He seems to have spent that winter with them, then returned through Macedonia, and then to Jerusalem with the collection for the impoverished church (cf. Acts 20:1-3; 1 Cor.16:1-9).