The instrumental music-making tradition of Lithuania Minor was officially recognised as a valuable part of the Intangible Cultural Heritage and included in the national register in 2022. In the 20th century, the way of preserving the instrumental music-making of the Lietuvininkai (the inhabitants of Lithuania Minor) typically used for folklore was not followed, and it would have ceased to exist. However, the folklore revival movement that emerged in the 1960s, along with the determined efforts of Antanas Butkus, a master instrument maker, to restore the folk music instruments of Lithuania Minor, and other favourable circumstances, gave rise to renewed interest and new directions for the development of the tradition. The purpose of this article is to explore the forms and development of this folklore tradition, and to identify the factors that had the most important impact on its decline, restoration and continuity.