Genealogical sources are being preserved not only in the state archives but also in libraries and museums.
In the Manuscript Department of the Vilnius University Library, there are record books of some Roman Catholic churches and 230 personal fonds preserved; in the Manuscript Department of the Wroblewski Library of the Lithuanian Academy of Sciences, there are record books of some churches and inventory lists of Lithuanian estates preserved; at the Rare Book and Manuscript Department of the Martynas Mažvydas Lithuanian National Library of Lithuania, there are record books of some Telšiai (Samogitian) diocese churches preserved.
preserved in the Lithuanian State Historical Archives: Documents, the access to which is not restricted by the law, are accessible in the reading rooms of the archives for the research into the original documents and digital document copies.
The documents kept in the Archives comprise 8 large sets: At present the total amount of the items preserved is 1,360 million, or over 17,500 linear metres of shelving space.records related to baptising, marriage, death, also, lists of parishioners, estate inventory lists, the population census data, etc.In our country, the main depository of genealogical sources is the Lithuanian State Historical Archives (8 Mindaugo Street, Vilnius). church record books from Vilnius, Seinai, Telšiai (Samogitia) Roman Catholic dioceses, and the record books of 1924 – 1940 from Panevėžys, Kaunas, Kaišiadorys, Vilkaviškis Roman Catholic churches.Access to documents is regulated by the Law on Documents and Archives of the Republic of Lithuania and related legislation particularly Civil Code and the Law on Legal Protection of Personal Data of the Republic of Lithuania.The article 19 of the Law on Documents and Archives of the Republic of Lithuania, embeds provision of free access to documents without delay period, except those documents the access to which is limited by other laws.