Sex scandals have also ensnared Berlusconi, whose wife filed for divorce in 2009 following reports of the then-prime minister's involvement with an 18-year-old girl.
Two years later, magistrates in Milan said they were investigating whether Berlusconi paid for sex with an underage prostitute named Ruby the Heartbreaker, then used his power to spring her from jail in an unrelated incident in which she was picked up for theft.
Berlusconi's trial on those charges began in 2011, shortly before he resigned from office.
Berlusconi has a vast business empire, including media holdings and construction companies. Forbes Magazine says he has a net worth of $6.2 billion.