Venice Police Chief Vito Danilo Gagliardi said that the stolen items were a pair of earrings and a brooch made of diamonds, gold and platinum. The pieces — owned by Sheikh Hamad bin Abdullah Al Thani — were snatched in the bold daytime robbery on the last day of the exhibit. A preliminary investigation revealed that the pair were able to delay the alarm system for one minute so it wasn’t triggered until the thieves were making their escape, Gagliardi said. He described the culprits as “skilled.”