The goal of this meeting is to discuss and consolidate recent advances in the vibrant research fields of string theory, holography, black hole physics, and cosmology. We will address important open problems through an active program of talks by well recognized scientific leaders in the field. In addition, we will organize an open discussion forum for researchers with close ties to the countries from the Balkan region and other parts of Eastern Europe in which we plan to brainstorm about future activities of the existing SEENET-MTP network, and other networking collaborations that will enhance the development of fundamental theoretical physics in these countries.