"Careful inspection of the tomb of Princess Sophie von Hohenlohe has unearthed a large underground compartment of about 4 meters by 3.70, completely empty", Gisottti said.
Not only was Emanuela Orlandi's body not found, the tombs did not even hold the skeletons of the two princesses supposed to be buried there.
The tombs belonged to two princesses, buried in 1836 and 1840.
The mystery surrounding the disappearance of an Italian teenager 36 years ago has deepened after two graves at the Vatican thought to possibly hold her remains were discovered to be empty.
The brother of long-missing Emanuela Orlandi, Pietro, attended the exhumation of two Vatican graves on Thursday as local officials searched for any trace of his sister. It included a photo of an angel in Vatican City's tiny Teutonic Cemetery.
Once the tombs are opened the remains inside will be inventoried and catalogued before tests are conducted on the age of the remains and their DNA. She was the 15 year-old-daughter of a Vatican bank employee whose family lived inside Vatican City. After searching for Emanuela incessantly for three decades, the family's lawyer had said they wouldn't be happy "if they find Emanuela's corpse just 200 yards from their home".
The Vatican confirmed that "the outcome of the search has been negative", according to ANSA. "No human remains or funeral urns were found", the Vatican spokesman Alessandro Gisotti said.
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The family sent a request to the Vatican secretary of state to have the tombs opened, which was granted last week.
Emanuela's mother still lives within Vatican City. Some have said she was kidnapped by the Mafia to put pressure on the Vatican to cough up a loan.
Cryptic letter: Last summer, the family received a letter saying, "If you want to find Emanuela, search where the angel looks", reports NBC News.
"The tomb had obviously been recently opened, there was new cement on it, but we didn't know why or when, we were given no information", Sgro told CBS News.
Emanuela's disappearance in 1983 is one of the most enduring modern mysteries of the headquarters of the Catholic Church and has been the subject of much speculation by Italian media. "Much depends on the environmental conditions, on the microclimate in which they are found, on the humidity, on the presence of infiltrations, on possible actions of microfauna".
Both graves were opened due to their proximity to one another and to "avoid possible misunderstandings about which grave is the indicated grave", a Vatican tribunal said.
"Documentary checks are underway on the structural interventions that took place in the area.in a first phase at the end of the 19th century, and in a second more recent phase between the 60s and 70s of the last century", the Vatican said.