Frankfurt is the city of the International Book Fair, the National Library – a city encompassing a variety of publishing houses, libraries and bookshops. In its museums, exhibition halls, and art galleries, Frankfurt displays its distinct style of contemporary and historical art and culture. Frankfurt’s highrises form part of the city’s identity. The skyline is unique, thanks to its extraordinary architectural blend of tradition and modernity. Europe’s largest skyscraper is also situated here, the Commerzbank building. Frankfurt is home to one of the world’s finest ballet ensembles. Frankfurt is a metropolis for techno and dance music, which lends the city a reputation of musical magnetism. The city’s numerous theaters and theater groups, the opera, and the concert house Alte Oper offer Frankfurt’s stage aficionados and lovers of fine arts a comprehensive and diverse program.