Where is the fashion capital of Europe?

London, UK.

In 2013, London had become the fashion capital of the world. It took the top spot from New York (http://www.languagemonitor.com/category/fashion/fashion-capitals/) in official rankings.

Barcelona came in 2nd in Europe (3rd worldwide), followed by Paris, Madrid, and Rome. (http://en.wikipedia.org/wiki/Fashion_capital).