Researchers are still digging into the question and sharing their findings decades after the Nazis sacked the homes of Jews during World War II.

Assa Traoré holds police responsible for her brother Adama Traoré's death. "She's ... shining the spotlight on the police violence and injustices that we face every day being Black," says a supporter.

One museumgoer says it's a "much more comfortable experience" to view the Mona Lisa without the mobs of tourists. The Louvre put in place mask-wearing, one-way paths and other distancing measures.