https://www.cnet.com/news/how-to-donate-to-notre-dame-cathedral-relief-efforts/

In addition to Macron promising to launch an immediate fundraising campaign, French philanthropists pledged donations totaling 700 million euros to rebuild Notre Dame Cathedral. 

Bernard Arnault, head of LVMH; François-Henri Pinault, CEO of Kering; and L'Oreal's Bettencourt Meyers family promised a combined 500 million euros on Tuesday. Apple CEO Tim Cook also tweeted that his company would pledge funds.