Crowds gathered on Easter Sunday to pray for the restoration of Notre Dame cathedral and to honour the firefighters who saved it from total destruction.
The Paris diocese invited those had wished to visit the iconic building for Easter Sunday to join Mass at the grandiose Saint-Eustache Church on the Right Bank of the Seine River.
Certain streets around the medieval cathedral also reopened six days after the blaze, which allowed tourists to get a closer look and local restaurants to reopen.
This came after firefighters declared the last hot points extinguished.
The group which struggled for nine hours to contain flames that consumed Notre Dame's roof and collapsed its spire, held a place of honour at the Saint-Eustache.
While police officers and a soldier guarded the 13th century church and visitors stood in a long line to have their bags checked before they could enter.
Paris Archbishop Michel Aupetit handed firefighters at the Easter Mass a book of scriptures which had been from Notre Dame.
"Your men were able to save many things in the cathedral. But you also saved an item that is precious for us," he said.
"It still is a bit dirty, full of ashes and likely a bit damaged by the fire. You saved it, and I wanted to give it to you. It's a very humble way to thank you."
Speaking of Jesus' resurrection, Mr Aupetit told the congregation: "We, too, brothers and sisters, we will rise again, just like our cathedral will rise again."
French sailors also paid tribute to the fire-ravaged building on Sunday, by lining up in the shape of the structure.
The Marine Nationale, France's navy, shared an aerial photograph of a large group of sailors on board an aircraft carrier standing in the shape of the cathedral.
The photograph was taken in the Indian Ocean of sailors of the Charles de Gaulle aircraft carrier and the sailors were showing "solidarity" with Paris in the wake of the blaze, the navy said.
Notre Dame is not expected to reopen to the public for five or six years, according to its rector, although the French president is pushing for a quick reconstruction and said it is hoped this will be within five years.
Investigators think the fire was an accident, which was possibly linked to renovation work.
