The Empire State Building in New York City is lit up blue, white, and red on Tuesday, April 16, 2019 in solidarity with the people of France following the fire at the Notre Dame Cathedral. [Photo: AFP/Johannes Eisele]"

The spire of One World Trade Center in New York City is lit up blue, white, and red on Tuesday, April 16, 2019 in solidarity with the people of France following the fire at the Notre Dame Cathedral. [Photo: AFP/Johannes Eisele]"

This photograph taken late on the evening of Tuesday, April 16, 2019 shows Bosnia and Herzegovina's Stari Most in the southern city of Mostar illuminated with the colors of the French flag out of respect for the people of France after a fire nearly destroyed the Notre Dame Cathedral in Paris. Stari Most is one of most recognizable icons of Ottoman architecture. In 1993, it was completely destroyed by artillery fire, some 427 years after it was built. It was rebuilt in 2004. [Photo: STR/AFP]"

The Lookout Tower on Petrin Hill in Prague is lit up blue, white, and red on Tuesday, April 16, 2019 in solidarity with the people of France following the fire at the Notre Dame Cathedral. [Photo: CTK via Images/IC]"

The façade of the La Fenice Opera House in Venice, Italy is lit up with the colors of the French flag on Tuesday, April 16, 2019 in solidarity with the people of France following the fire at the Notre Dame Cathedral. [Photo: ANSA via IC/Andrea Merola]"

The dome of the Chapel of the Holy Shroud in Turin, Italy is illuminated in the colors of the French flag on Tuesday, April 16, 2019 in solidarity with the people of France following the fire at the Notre Dame Cathedral. The Chapel of the Holy Shroud was severely damaged by a fire in 1997 and reopened to the public last September, after 21 years of restoration. [Photo: EPA via IC/Alessandro di Marco]"