By Phil Stewart ROME (Reuters) - A convicted Mafioso and four other people went on trial on Thursday accused of the 1982 killing in London of Roberto Calvi, known as "God's Banker" because of his ties to the Vatican.

ROME (Reuters) - More than two decades after Roberto Calvi was found hanging under London's Blackfriars Bridge, five people stood trial in Italy on Thursday accused of murdering the man known as "God's banker" for his close Vatican ties.