Warsaw Chopin Airport the busiest airport in the newer EU member states. Formerly known as Warsaw-Okecie Airport "()" or Okecie International Airport, the airport bore the name of its Okęcie neighborhood throughout its history, until its renaming for Polish composer and former Warsaw resident Frédéric (Fryderyk) Chopin in 2001. Despite the official change, "Okecie" "()" remains in popular and industry use, including air traffic and aerodrome references. An underground railway station connected from the airport to Warsaw's suburban rail system was opened in June 2012 in time for the Euro 2012 football championships, and on 25 November 2013, the airport announced accommodating –
Frédéric Chopin by Liszt, Clementi and Moscheles, in his two sets of studies (Op. 10 published in 1833, Op. 25 in 1837). Chopin also endowed popular dance forms with a greater range of melody and expression. Chopin's mazurkas, while originating in the traditional Polish dance (the "mazurek"), differed from the traditional variety in that they were written for the concert hall rather than the dance hall; as J. Barrie Jones puts it, "it was Chopin who put the mazurka on the European musical map." The series of seven polonaises published in his lifetime (another nine were published posthumously), beginning with the Op.