The BBC analysis.

His business contacts and media role have led to accusations of conflict of interest, especially over legislation seen as protecting his commercial interests. Mr Berlusconi has been put on trial at least six times over financial matters. Although found guilty on three occasions, he was later acquitted or benefited from the expiry of the statute of limitations.

His legal troubles took a surprise turn in October 2009 when the constitutional court overturned a law granting him immunity while in office. The ruling meant he could face trial in at least two court cases, including one accusing him of corruption. The law was pushed through by Berlusconi’s coalition in 2008 when he faced separate trials in Milan for corruption and tax fraud tied to his Mediaset broadcasting empire.

Italy’s heady blend of politics and media has made headlines inside and outside the country, with watchdogs and some politicians pointing to Prime Minister Berlusconi’s influence over both public and private broadcasting.

The public broadcaster, Rai, has traditionally been subject to political influence, and Mr Berlusconi’s Mediaset empire operates Italy’s top private TV stations. Between them, Rai and Mediaset effectively control Italy’s TV market and are a potentially powerful political tool.

A media law, passed in 2004, heralded the creation of new digital TV channels and the partial privatisation of Rai. Critics said the bill reinforced Mr Berlusconi’s hold on the media.

From :

http://news.bbc.co.uk/2/hi/europe/country_profiles/1065345.stm#overview