I didn't know where else to put this information and then I saw this thread. I am quoting from the link I give at the end:
Founded in 1897, Juventus is one of the oldest and most renowned football clubs of the country (together with A.C. Milan and F.C. Internazionale Milano) and, historically,
one of the most successful [1] football clubs of the world with 11 official international titles. Juventus was the first club to have won all three Major European trophies at least once: the European Cup, the (now-defunct) Cup Winner's Cup and the UEFA Cup, a feat achieved by only two other clubs since. Juventus is also the only team in the world to have won all international official championships (all official European tournaments and the Intercontinental Champions Club' Cup).
With 40 official national titles in team honours (27 National Championships, 9 National Cups and 4 Italian Supercups), Juventus is the most successful Italian football club.
The two stars on the Juventus shirt signifies that they have won the Scudetto over 20 times. In fact,
Juventus have won the Italian Championship 27 times, more than any other Italian club - indeed, no other club has won the championship over 20 times.
Juventus is the most well supported football club in Italy with 11,040,000 fans (31% of Italian football fans, according to the Doxa Institute-L'Expresso’s research of April 2006),[2]
and one of the most supported football clubs in the world. Famous fans include former French Prime minister Francois Mitterand, and the former Soviet leader Mikhail Gorbachev amongst others.
Despite (or perhaps because of) their huge popularity, Juventus have many rivals in Italy. Juventus' main rivals sometimes cite the difference in the success of the club domestically and in European competition, suggesting "influenced" refereeing in Italy as the cause. However Juve have won 11 official continetal titles[3].
Significant rivalries include those with neighbours Torino, and also Internazionale, AC Milan, Fiorentina, AS Roma, and S.S. Lazio.
Notably, matches between
Juventus and Internazionale are referred to as the Derby d'Italia (Derby of Italy), as these sides are the most supported in Italy. This rivalry has intensified in recent years due to disagreements between the two clubs.
The 2006 scudetto was awarded to rivals Inter Milan (who only finished in 3rd place), while the 2005 title is vacant.
Since the trial, some further controversy has emerged especially among the Juve fanbase, due to perceived bias in favour of Inter Milan who were the main beneficiary from the 2006 Serie A scandal.
The company who caught the infamous Moggi phone taps; Telecom Italia has since been taken over by President of the FIGC Guido Rossi from Marco Tronchetti, who is also the president of Inter's main sponsor Pirelli. This is coupled with the fact that Rossi is said to be a loyal Inter fan.[12]
Source:
http://en.wikipedia.org/wiki/Juventus
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And to answer the question : INTER