Theft of Caravaggio's "Nativity with St. Francis and St. Lawrence" (1969): Caravaggio's masterpiece, "Nativity with St. Francis and St. Lawrence," was stolen from the Oratory of San Lorenzo in Palermo, Sicily. The theft was carried out by an organized crime group, and the artwork has not been recovered since. Given the painting's immense value and significance, its whereabouts remain a mystery.