Persatoean Tiang Kemerdekaan

A propaganda poster created by Poesat Tenaga Peloekis Indonesia (P.T.P.I) in 1945 for the Indonesian proclamation of freedom on August 17, 1945, features a striking illustration of the Indonesian flag and map with red lines connected to the number “1” at the bottom right. The poster declares, "Persatoean Tiang Kemerdekaan" meaning “Unity, the Foundation of Freedom,” emphasizing that unity is essential for achieving and maintaining freedom. This poster is part of a scrapbook titled "We Struggle with Posters (P.T.P.I.)," which contains reduced reproductions of P.T.P.I. posters from 1945-1947, addressing both Indonesian and global issues.