بسم الله الرحمن الرحيم
اللي منحه اللقب هو
الاتحاد الدولي للتأريخ والاحصاء IFFHS طبعا نفس الاتحاد اللي منح الهلال لقب نادي القرن الأسيوي 
وهذا الاعلان عن حصول ريال مدريد على لقب نادي القرن الأوروبي من موقع ريال مدريد الرسمي: 
The IFFHS names Real Madrid the Best European Club of the past century Best Club of the 20th Century 
The IFFHS names Real Madrid the Best European Club of the past century
IFFHS.com / Realmadrid.com
For some years now, the IFFHS has been asked by clubs, sports journalists and fans to determine the clubs of the century for each continent, but on a realistic basis without imaginary values and subjective influences. The rankings published so far have been based on the number of the titles won, placings or marathon tables in competitions, revealing an average for each club. Because the Club World Ranking (by IFFHS) has been determined monthly only since January 1991, it cannot be used as the basis for determining the club of the century. The IFFHS has decided upon these continental clubs of the century (1901-2000 each) by including continental rankings to determine exclusively on the basis of individual match results of continental club competitions. The national competitions are merely a prerequisite to qualify for the continental club competitions. Intercontinental club competitions were not taken into consideration.
Looking at the ranking over the decades shows up some interesting detials. Ferencváros TC Budapest led the European ranking for 1950, ahead of AC Sparta Prague, SK Slavia Prague, Juventus FC, First Vienna, FK Austria Wien, SK Rapid Vienna, Újpest Dózsa, FC Internazionale Milan and Bologna. Thereafter, Real Madrid catapulted to the top and by 1970 led, ahead of FC Barcelona, Inter Millan, Ferencváros TC Budapest, Benfica, Milan AC, Manchester United FC, AC Sparta Prague, Juventus and Újpesti Dózsa.
Real Madrid extended their lead up to 1980 and Liverpool, Ajax and Bayern were the three new clubs that earned a place among the "Top 10": Real Madrid CF was ahead of FC Barcelona, Milan AC, FC Internazionale Milano, Ferencváros TC Budapest, Juventus FC Torino, AFC Ajax Amsterdam, Sport Lisboa e Benfica, Liverpool FC and FC Bayern München. The 1990 ranking was again topped by two Spanish clubs, while "Juve", Liverpool, and Munich had improved their positions. RSC Anderlecht was the only new side on the "Top 10", replacing the Ferencváros Torna Club. Real Madrid had a gigantic lead in 1990 with 136 points over "Barça".
The last decade of the 20th century saw "Juve", "Barça", Ajax and Bayern gain the most points of all the European clubs, while Liverpool, Anderlecht and Benfica achieved the fewest points. No new club managed to get a place in the "Top 10". The only changes were among the clubs swapping positions in places 2 to 9. Real Madrid took the honours with an unexpectedly large lead to become "Europe's Club of the Century". "Juve", "Barça", Milan and Bayern follow and are placed ahead of "Inter". Amsterdam and Brussels are represented in the "Top 10" while "ManU" was only in 11th place. The latest "All-Time Club World Ranking" (1991-2008) shows how dominant Manchester United were in the new millennium, and how large was Real Madrid's lead over "Barça" in 1990. London sides Arsenal & Chelsea also turned up.
الرابط
http://www.realmadrid.com/cs/Satellite/en/1202793813778/noticia/Noticia/Best_Club_of_the_20th_Century.htm
