The 15-minute meeting was the first time they had come face-to-face since February's acrimonious encounter in the Oval Office.

The Ukrainian president said the meeting could prove historic if it delivers the kind of peace he is hoping for, and a White House spokesman called it "very productive."

The White House said their discussion was “very productive” and that more details would be released later. The meeting lasted about 15 minutes inside St. Peter’s Basilica at the Vatican just before they took their seats for the outdoor funeral service. Zelenskyy said “good meeting” on social media after the funeral.