This graduation thesis represents a project idea of the Glagolitic Museum as part of the National and University Library in Zagreb. The idea of the museum is to exhibit all significant Glagolitic heirdom created on the territory of Croatia and Europe in one place, with the goal to establish the institution for the interpretation, research and protection of Glagolitic heritage. The paper presents Glagolitic script, its development and peculiarities, and a catalog of the most important Glagolitic monuments, manuscripts and printed books. The influence of Glagolitic on Croatian culture, politics and literature throughout the history is presented. The structure and organization of the museum are presented in the paper. The museum consists of management and a professional council, professional activity and volunteers. The importance of marketing in nonprofits is outlined. The museum is intended for all visitors with special emphasis on students. The Glagolitic Museum as a National Museum interprets Glagolitic as a tangible and intangible heritage as part of a national and cultural identity.