In 2011 the National Astronomical Observatory Rozhen will celebrate its 30th Year Anniversary. To commemorate this milestone the Institute of Astronomy, Bulgarian Academy of Sciences organizes an international conference. The conference will be held on September 26-29 in Smolyan. It will be dedicated to the unique role of the National Astronomical Observatory as a center for research and education in astronomy, and as a key element of the national research infrastructure. For more information and for registration visit the site of the conference.