Flames rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
Notre Dame Cathedral is seen burning in Paris, Monday, April 15, 2019. (AP Photo/Lori Hinant)
Notre Dame Cathedral is seen burning in Paris, Monday, April 15, 2019. (AP Photo/Lori Hinant)
Flames rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
Flames rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
View from the top of the Notre Dame Cathedral with the Eiffel Tower in background. (AP Photo/Francois Mori)
Notre Dame cathedral is seen burning in Paris, Monday, April 15, 2019. (AP Photo/Lori Hinant)
People watch as flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
Flames rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
People watch as flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
People watch as flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
Firefighters tackle the blaze as flames and smoke rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. (AP Photo/Thibault Camus)
People watch Notre Dame cathedral burning in Paris, Monday, April 15, 2019 as massive plumes of yellow brown smoke and ash filled the air around the historic cathedral. (AP Photo/Oleg Cetinic)
Photo taken from inside a cafe of a police car patrol as Notre Dame cathedral burns in Paris, Monday, April 15, 2019. (AP Photo/Lori Hinnant)