The bright primary colors on the banners and the priests’ robes and cloaks reflect the signature style of designer Jean-Charles Castelbajac.

In an interview with NBC News, Castelbajac, a devout Catholic who has collaborated with the Paris Diocese three times in designing its liturgical clothing, shared his experience.

"When one year and a half ago, Monseigneur Urich called me and gave me this mission to be the one who designed the vestments for the reopening of Notre Dame, I should say that my heart was beating especially fast," he said. "It was to inscribe myself not as a designer but as a companion, as someone part of a long chain of 800 years as one of those who contributed to Notre Dame.”

The religious service has begun at Notre Dame, with 113 banners representing each parish in Paris entering the cathedral as part of the procession.

Speaking at the grand reopening ceremony, Macron said, “I am before you to offer the gratitude of the French nation, gratitude towards those who saved and rebuilt the cathedral.”

He also expressed gratitude “to all those who are present at this moment where we are about to take part in the returning of her [Notre Dame] to Catholics, to Paris, to France and the entire world.”

Thousands of people watching the display outside the cathedral clapped for first responders as they appeared on the screen.

“We are all here and it’s wonderful," one elderly man in the crowd said.

“Regard — look at this!” he exclaimed, pointing to the screen.

Macron has begun his speech at Notre Dame, a pivotal moment in the cathedral's grand reopening ceremony. It was moved indoors due to weather.

Zelenskyy said today that he had a “good and productive trilateral meeting” with Trump and Macron at the Élysée Palace.

“President Trump is, as always, resolute. I thank him. I also extend my gratitude to Emmanuel for organizing this important meeting,” he wrote on social media. “We all want this war to end as soon as possible and in a just way.”

Zelenskyy said the leaders agreed to keep working together and that “peace through strength is possible.”

A musical recital is now underway at Notre Dame, featuring violinist Renaud Capuçon and cellist Gautier Capuçon, two brothers performing an interpretation of "La Passacaille" by Handel.

Enthusiastic applause erupted inside Notre Dame as firefighters entered wearing fluorescent orange uniforms and holding their shiny helmets. Also present are representatives of those who played key roles in saving the cathedral.

A video is now being played that shows the devastating fire on April 15, 2019 and the heroic firefighters who battled the fire to save the famous site.

The film also pays tribute to the “builder” who restored Notre Dame. This film is being projected on large screens outside of Notre Dame before 40,000 persons who have come to flank the Seine and participate in the opening ceremony.