French President Emmanuel Macron has told workers who revived Paris' iconic, fire-ravaged Notre Dame cathedral, that they "achieved what was thought impossible."

French President Emmanuel Marcon, his wife and a select number of people were given a tour of Notre-Dame Cathedral on Friday, as it is set for a grand reopening to the public next week after hundreds of millions were poured into a renovation following a devastating early 2019 fire.

You’ve achieved what was said to be impossible,” the French president told workers at the Paris monument, which will reopen after the 2019 fire.