With a view to numerous inquiries concerning visas, aliens from third countries travelling to the Czech Republic are advised that visas issued by the Czech Republic are national and not Schengen visas. Upon its accession to the European Union on May 1, 2004, the Czech Republic did not become part of the Schengen area and valid Schengen visas can therefore not be used as visas for entering the territory of the Czech Republic. Likewise, Czech visas do not entitle the aliens to enter the territories of the other EU Member States. All aliens required visas when travelling to the Czech Republic must therefore have valid Czech visas, corresponding to the purpose and length of their stay in the territory of the Czech Republic.