London - Princess Grace of Monaco belonged to the Order of the Solar Temple, whose suicide rituals have claimed 74 lives since 1994, the Sunday Times has reported, quoting producers of a documentary on the cult. David Carr-Brown and David Cohen say Princess Grace was initiated into the order only a few months before her death in a car accident in September 1982. The Channel Four documentary, which will be broadcast next Monday, says the princess gave nearly $10 million to the sect before her death.