A fire broke out on Monday afternoon at the iconic Notre-Dame cathedral in Paris, and quickly spread across the building, destroying its famous spire. /AFP Photo

French President Emmanuel Macron visited the site on Monday night and vowed to devote to restoring the historic building, "We’ll all rebuild this cathedral together, and it’s undoubtedly part of the French destiny and the project we’ll have for the coming years.” /Getty Images

Authorities declared Tuesday morning that the fire had been contained as firefighters hosed the south side of the transept to cool down the building. The main stone structure, including its two towers, was luckily saved intact. /Getty Images

The Notre-Dame cathedral, completed in 1345, is considered a feat of Gothic-style architecture, as well as a major cultural symbol of France. /Getty Images

The cause of the fire is still unknown, but firefighters said it was possibly linked to ongoing renovation and cleaning work. /Getty Images