The mystery behind the disappearance of an Italian teen 36 years ago intensified Thursday as the tombs of two 19th-century princesses buried at the Vatican were unsealed. Not only was the body of Emanuela Orlandi not found, but neither were the remains of Princess Carlotta Federica or Princess Sophie von Hohenlohe. “The last thing I expected was to find empty tombs,” said Orlandi’s brother, Pietro Orlandi, 60. Emanuela, the daughter of a Holy See employee whose family lived within the Vatican walls, was last seen leaving a music class at age 15 in 1983.