He comforted French soldiers in Afghanistan and victims of the Bataclan terror attack in Paris — and now he’s being hailed as a hero during another of his country’s darkest moments.

Priest Jean-Marc Fournier is credited with dashing into a burning Notre Dame Cathedral on Monday to save its most sacred relic: the crown of thorns that Jesus is believed to have worn.

“Father Fournier is an absolute hero,” a first responder told Irish radio station NewsTalk Tuesday.

“He showed no fear at all as he made straight for the relics inside the cathedral and made sure they were saved. He deals with life and death every day and shows no fear.”

Philippe Goujon, the mayor of Paris’ 15th Arrondissement, told reporters gathered outside Notre Dame Tuesday that Fournier insisted he be allowed into the smoldering building with firefighters.

Fournier, who is in his 50s and currently serves as the chaplain for the Paris Fire Brigade, is no stranger to disasters — he tended to the injured and prayed over the 89 people killed in the 2015 Bataclan attack.

He also served in the Diocese of the French Armed Forces for seven years and survived an ambush that killed 10 soldiers in Afghanistan, according to Sky News.

As the massive inferno swept across Notre Dame’s roof Monday night, Fournier joined a human chain of responders who helped haul out most of the church’s priceless relics, including a tunic worn by King Louis IX.

The crown of thorns, made of spiked rushes wrapped into a wreath and later tied with gold filament as part of its display, was brought to Paris by King Louis IX in the 13th century. Since 1896, it’s been kept under glass and very rarely put on public display.

Fournier also saved the church’s Blessed Sacrament, the devotional name for the body and blood of Christ in the form of consecrated bread and wine.