ABC News April 17, 2019

French prime minister announces competition to rebuild Notre Dame Cathedral's iconic spire

WATCH: Competition to rebuild Notre Dame's iconic spire

France's prime minister has announced "an international architecture competition" to rebuild the iconic arrow-like spire atop the Notre Dame Cathedral in Paris, which caught fire on Monday evening.

“Should we reconstruct an arrow? The same? Adapted to the techniques and challenges of our time? An international architecture competition for the reconstruction of the cathedral spire will be organized," French Prime Minister Edouard Philippe wrote on Twitter Wednesday.

(MORE: Flames cause 'colossal damages' to Notre Dame Cathedral in Paris)

The 300-foot spire toppled over in flames on Monday night as a massive fire engulfed the world-famous medieval Catholic cathedral, an 850-year-old landmark situated in the middle of the Seine river on a tiny island within the French capital. Firefighters battled the blaze for nine hours before quelling the flames.

No one was killed in the fire, the cause of which is under investigation.

(MORE: The national and architectural significance of Notre Dame Cathedral)
Francois Guillot/AFP/Getty Images
Smoke and flames rise during a fire at the Notre-Dame Cathedral in central Paris on April 15, 2019.

The cathedral was partially encased in scaffolding while undergoing a $170 million renovation at the time of the blaze. Much of the ribbed oak roof, made up of centuries-old wooden beams, was destroyed.

Yet, despite the extensive damage, which will take years to repair, the facade of the historic edifice appears to be mainly intact with its belfries and many other iconic features spared.

(MORE: Notre Dame Cathedral's famed rose windows, organ spared: Church official)
Ludovic Marin/AFP/Getty Images
A combination of two pictures made on April 16, 2019 shows above: the heart and transept at Notre Dame de Paris Cathedral in Paris on June 26, 2018 and, bottom, the same view of the Notre-Dame Cathedral in Paris in the aftermath one day after a fire devastated the cathedral on April 16, 2019.

Msgr. Patrick Chauvet, who was at the cathedral when the flames erupted during a mass, told reporters the famous 18th-century organ, which boasts 8,000 pipes, and three rose-stained glass windows, which date back to 1250, both survived the inferno.

A bronze rooster that sat atop a cross on the spire was also found only slightly damaged, according to Chauvet.

(MORE: After Notre Dame Cathedral fire, concerns for treasures not yet accounted for)
Ludovic Marin/AFP/Getty Images
A combination of two pictures made on April 16, 2019 shows people attending a mass at the Notre-Dame de Paris Cathedral in Paris on June 26, 2018 and bottom, an interior view of the Notre-Dame Cathedral in Paris in the aftermath one day after a fire devastated the cathedral on April 16, 2019.

Valerie Pecresse, president of the Ile-de-France region that encompasses Paris, called it a "miracle" that the walls of the Gothic cathedral are still standing.

Firefighters remained on site Wednesday working to secure the structure, dampening potential hotspots and removing priceless artwork, artifacts and relics, according to a spokesperson for the Paris Fire Brigade.

(MORE: French President Macron says he wants Notre Dame Cathedral rebuilt in 5 years
Ludovic Marin/AFP/Getty Images
A picture taken on March 27, 2019, shows a scaffold during the restoration of Notre-Dame de Paris cathedral, in Paris.

French President Emmanuel Macron said in a televised address Tuesday that he wants to see the fire-gutted cathedral restored in five years and it will be "even more beautiful." Nearly $1 billion in donations from worshipers and billionaires around the world has already been pledged to help rebuild it.

The blaze came at the start of Holy Week, the busiest and most important period of the liturgical year. Easter is on Sunday.

Bells at all of the churches and cathedrals across France will ring out in unison on Wednesday evening in honor of the Notre Dame Cathedral.

ABC News' Clark Bentson, Ben Gittleson, Angus Hines, Bill Hutchinson, Julia Jacobo, Mikey Kay, James Longman and Phoebe Natanson contributed to this report.