The Department of Restoration was established in 1988. With the expansion of its functions in 2003 it was transformed into the Department of Restoration and Digitising.

The restorers of the NLL carry out conservation and restoration works on a high professional level, restore the printed works that have suffered in the course of time – books, newspapers, posters, maps, scores, prints, including rarities. From 2002 to 2004 the specialists of the Department restored the incunabulum Clemens V. Constitutiones — the norms of church law collected by Pope Clemens V (1264—1314) and printed in 1476 in Basel at the printing house of M. Wenssler.

The NLL uses conventional, internationally recognised and tested methods of restoration and conservation, it is also engaged in digitising to ensure long-term preservation and wide accessibility of the culture historical treasures stored by the Library. Since 2000 the Department is implementing a number of largescale projects in cooperation with other libraries, museums and archives, the first to be scanned are the periodicals. The editions in disastrous state are the priority. Thousands of newspaper pages can be found on the webpage of the National Library.