The international students have to apply for visa depending on their citizenship and the lenght of studies at Vilnius University.
Please note that details of the procedure for application for the residence permit / visa D might be changed by the time you decide to visit the country therefore we suggest to consult the nearest Lithuanian embassy before the arrival or internet:
Ministry of Foreign Affairs https://www.urm.lt/default/en/
Migration Department under the Ministry of the Interior of the Republic of Lithuania http://www.migracija.lt/
Note: It is the responsibility of individual students to present all required documents in a timely manner at the Migration department to maintain a valid and legitimate visa (or residence permit) status throughout their study at VU.