Notre-Dame fire: How gamers are getting 'inside' the cathedral
20 April 2019 Last updated at 14:26 BST
People are returning to a 2014 video game to visit Notre-Dame cathedral before the flames took hold.
It's from the Assassin’s Creed series, which later spawned a Hollywood film starring Michael Fassbender.
The developer, French firm Ubisoft, has pledged €500,000 (£433,000; $565,000) to the reconstruction of the fire-damaged building.