|1919||The Cabinet of Ministers of the Republic of Latvia adopts the decision on the establishment of the State Library of Latvia|
|1920||The Library starts receiving the legal deposit copy of Latvian printed editions. The legal deposit copies of the USSR and LSSR (1941)|
|1921||The current series (numbered) of the bibliographical index “Latvian Science and Literature” of articles published in periodicals is published. Retrospective series (lettered) (1926)|
|1922||The “Law on the State Library” and the “Law on the Central Book Catalogue” adopted. The interlibrary loan (ILL) launched in Latvia|
|1924||Latvia joins the Brussels Convention that envisages the international exchange of printed matter published with state funding - official documents, scientific and literary publications|
|1927||"The Bulleting of the State Library”, the index of books published in Latvia, bibliographical monthly magazine sets the foundation for regular national bibliography. The Association of Latvian Librarians (ALL) becomes the member of IFLA (International Federation of Library Associations). ALL renews its membership in IFLA in 1999|
|1940||The State Chamber of Books (since 1989 - the Institute of Bibliography) established at the State Library of the Latvian SSR. An independent institution since 1959, merged into the structure of the NLL in 1993.|
|1946||The closed stack or the so-called specfonds has been formed. Transferred for general use in 1988|
|1949||Start of the publication of the national registering bibliographical index “Press Chronicle” (since 1957 — “The Press Chronicle of the Latvian SSR”)|
|1950||Start of the publication of the analytical bibliographical edition “Chronicle of Magazine and Newspaper Articles”|
|1958||The State Central Sheet Music Library is joined to the Library, establishing the Music Department|
|1968||The Library organizes the first summer seminar-camp for Latvian, Lithuanian and Estonian libraries LiLaEst|
|1988||The Council of Ministers of the Latvian SSR adopts a decision on building a new State Library building|
|1992||The Law of the Republic of Latvia “On the National Library of Latvia” is adopted|
|1993||The NLL becomes the member of the Conference of the Directors of European National Libraries (CENL)|
|1995||The Baltic Central Library, created by Oto Bong (1918—2006) is made accessible to the readers|
|1996||The Council of Europe Information Office is opened at the NLL|
|1997||Library Information Network Consortium established for the implementation of LATLIBNET project (the present state agency Culture Information Systems)|
The Support Foundation of the NLL established (at present – the Society)
The depository of the NLL opened in Silakrogs (the present repository). Its second stage commissioned in 2006.
The Centre for professional continuous education, established by the NLL, the University of Latvia, the Library Information Network Consortium and IT company Alise, is launched (at present – the Training Centre of the NLL. Accredited in 2008)
The NLL starts the building of the digital library with the project “Heritage 1: Preservation of Latvian periodicals (1822— 1940)”.
UNESCO General Assembly in Paris approves “Resolution for the support to the building of the NLL” submitted by the NLL
475 years pass since the first book in “common Livonian, Latvian and Estonian language” was printed.
Launch of the NLL electronic catalogue.
The International Council of Experts of UNESCO established for the support of the construction of the NLL
The united reader’s card of the Consortium Libraries introduced.
The 15th annual meeting of CENL held in Riga
The Bank of Latvia issues a one lat coin with the image of the new NLL building.
The Parliament of the Republic of Latvia passes the Law on the Construction of the NLL
|2004||The clearing of the NLL building site starts|
The foundations of the National Digital Library of Latvia “Letonica” are laid.
The completion of the international project TEL-ME-MOR.
The NLL becomes a full member of TEL (The European Library)
|2007||The NLL included in the list of the national research institutions|
|2008||The construction of the new NLL building starts|
|2009||On August 29 the National Library of Latvia celebrates its 90th anniversary|
|2010||In NLL are installed large-scale data storages (tape libraries) for storage of digitized stocks of library|
|2011||Rafter feast of the new NLL building|
|2014||New NLL building – Castle of Light – is opened for visitors|