ENM. K. Čiurlionis National Museum of Art has the largest protected interwar Lithuanian organizations flags collection. All the flags set in 2010 were prepared by the published catalogue of the museumalbum, "Our flag in 1918–1940. M. K. Čiurlionis National Museum of Art collection". The book is about the inter-war Lithuanian societies, ceremonial flags, images of flags stored in the museum and their technical parameters. However, there is little data in the book on the creator of the flag, the precise chronology and absolutely no data on mandatory requirements for appearance, flag accessories, the date of sanctifying, and so on. This article provides additional information about the inter-war Lithuanian flags of eleven organizations. It shows the dates of the establishment and changes of the flags, the process of regulation and provides some information about the authors of flags' projects. It also contains more than 50 flags of the acquisition and sanctifying date. [From the publication]