Because of its unique perspective on art, because of the OSTEN Museum's impressive collection of over 13,000 works, because of all the creative and innovative forms of collaboration that help to better understand and appreciate artists around the world, and because of establishing the globally recognized voice of Skopje, N. Macedonia - OSTEN is an excellent base for events such as the OSTEN Biennial and the OSTEN Biennial of award-winning authors. These interrelated biennial events attract artists from all over the world, educate a wider audience and animate art professionals (curators, art historians, critics...), in fact all those who provide insights and produce materials that document developments and movements of art in our time.

The Osten Biennial is held in the even years, and the Osten Biennial of award-winning authors in the odd years.