AC Milan - Wikipedia

Legendary tactician Nereo Rocco, the first proponent of catenaccio in the country, was Milan's longest-serving head coach, sitting on the bench for over nine years (in two spells) in the 1960s and early 1970s, winning the club's first European Cup triumphs. Italian Prime Minister Silvio Berlusconi, who purchased the club in 1986, is Milan's longest-serving president (23 years, due to a two-year vacancy between 2004 and 2006).