which is the best european capital city ?

Berlin With a population of 3.4 million people

Berlin is a world city of culture, politics, media, and science

The city of Paris, within its administrative limits largely unchanged since 1860, has an estimated population of 2,193,031

In 2009 and 2010 Paris has been ranked among the 3 most important and influential cities in the world, among the first 3 "European cities of the future" - according to a research published by Financial Times and among the 10 cities in the world "where to live in" according to the British review Monocle (June 2010).

Rome is the capital  of Italy and the country's largest and most populated city and comune, with over 2.7 million residents 

Rome's history spans over two  and a half  thousand years

Rome has been nicknamed "caput mundi" (latin for"Capital of the World") and "The Eternal City"

London has a diverse range of peoples, cultures and religions, and more than 300 languages are spoken within its boundaries. In July 2007 it had an official population of 7,556,900 within the boundaries of Greater London,

London It is the largest metropolitan area in the United Kingdom and the largest urban zone in the European Union by most measures.