Alain Robert, or the “French Spiderman,” climbed French energy group Engie's building in the La Defense business district outside Paris on Monday without a harness to raise funds for the renovation of Notre-Dame cathedral. /VCG Photo

The 56-year-old used horizontal struts running up the Engie headquarters, about 185 meters, in La Defense business district. /VCG Photo

“Because there’s no money left in the government coffers, the cathedral is falling into disrepair,” he told Reuters ahead of the climb. /VCG Photo

Robert has climbed more than 100 structures, including the Golden Gate Bridge in San Francisco and Burj al Khalifa in Dubai, as well as the same tower in Paris in 2016. /VCG Photo