At the end of November 2016 the National Library St. St. Cyril and Methodius and the King Abdulazis Foundation of the Kingdom of Saudi Arabia signed a Memorandum of Cooperationas an expression of the willingness of both sides to develop and strengthen cooperation and bilateral relations.

At the beginning of November 2016, the National Library of Bulgaria St. St. Cyril and St. Methodius and the National Library of HungarySzéchényi signed a cooperation agreement.