International cooperation of Lithuanian archives occurs through agreements with neighboring countries like Ukraine, Belarus, Estonia, Latvia, Poland, Russia, and others like Kyrgyzstan, Georgia, and Kazakhstan. This cooperation includes exchanging professional information and publications, organizing joint exhibitions, and sharing digitized and microfilmed copies of relevant documents. Some notable exchanges include copies of letters from Lithuanian dukes to Latvia and documents from Germany. Cooperation also occurs between Lithuanian archives and institutions like Stanford University to share copies of historical documents.