The Apostle Paul
Galatians 2:1ESV·traditional attribution

Then after fourteen years I went up again to Jerusalem with Barnabas, taking Titus along with me.

John Calvin Reformed @genevareformer

1. Fourteen years after. This cannot with certainty be affirmed to be the same journey mentioned by Luke. (Acts 15:2.) The connection of the history leads us rather to an opposite conclusion. We find that Paul performed four journeys to Jerusalem. Of the first we have already spoken. The second took place when, in company with Barnabas, he brought the charitable contributions of the Greek and Asiatic Churches.

Matthew Henry Presbyterian @wholebiblehenry

It should seem, by the account Paul gives of himself in this chapter, that, from the very first preaching and planting of Christianity, there was a difference of apprehension between those Christians who had first been Jews and those who had first been Gentiles.

Commenting on Galatians 2:1-10

John Gill Reformed Baptist @doctorgill

Then fourteen years after I went up again to Jerusalem,.... That is, either after it pleased God to call him by his grace, and reveal his Son in him; or rather after he had been at Jerusalem to see Peter, with whom he stayed fifteen days, and then went into Syria and Cilicia; so that it was seventeen years after his conversion that he took...