While planning to visit a country in Europe which is part of the Schengen treaty, many travelers are confused whether they require a Schengen visa or not to enter the Schengen states. Following is a list of nationalities that require the Schengen visa. The Schengen visa applications is processed at the embassy/consulate office in your home country. The Schengen visa will allow the visa holder to stay for a maximum of 90 days in a half-yearly period. The schengen visa application can have specific provision which can be obtained by contacting the embassy office at your home country.