The Organization of Ukrainian Nationalists (OUN) was an Ukrainian-nationalist political organization established in 1929 in Vienna.
The organization's symbols were established in 1932 and were published in a magazine 'Building a Nation'. The author of the OUN emblem with stylized trident (nationalistic trident) was R. Lisovsky. The organization's anthem "We were born in a great hour" (Ukrainian: Зродились ми великої години) was finalized in 1934 and also was published in the same magazine. Its lyrics were written by Oles Babiy, while music, by composer Omelian Nyzhankivsky.