In this work we analyse the community structure of the .cat top level Web domain. The .cat is a relatively young Web domain, opened up for registration in February 2006. It is administered by Fundació puntCat,1 a non-profit organization whose goals are to highlight the Catalan language and culture, but also include promoting its usage and encourage related research. Since early days, Fundació puntCat has been performing monthly crawls of the whole domain. This offers an interesting study case: the possibility of watching in detail the evolution of this domain during a long period of time.