M9 Master Project, Treshold of the Dream - Philharmonic - Natural Core of Belgrade, 2013 Part 2 Project 2013 Nastasja Mitrovic University of Belgrade | Serbia The conclusions of the investigations which were carried out in a visual essay are used as the basis for the development of the design methods as well as the formal framework for the theoretical interpretation of the themes. The title of the composition by Ljubica Maric: 'The Threshold of a Dream', cantata for three soloist and chamber orchestra from 1961. represents a basis for a setting of the thesis. Double infinity as the main concept researched in this thesis is spatially interpreted as dematerialization of existing spatial structures of Belgrade fortresses through time on one hand and burying the program of the Philharmonic and the concert hall deep underground on the other hand. Stretching is used as a mechanism for pixellation (smearing) of boundary line, that is, gradient formation on the line at infinity, and it opens up a possibility to define the amount of inter-spaces. Transposed into an architectural method, this system represents a rejection of relationships based on division, the difference between the outside and the inside, in order to create the possibility for infinity. The spatial framework is the old city core, a 125-meter-high cliff with Belgrade Fortress and Park Kalemegdan above, located at the junction of the River Sava and the Danube. The mound is treated as an independent entity used in it’s entire volume for imprinting the program of the Philharmonic where historical layers and natural parkland are used as atmospheric framework. The remains of the fortresses, drilled cavities of the Philharmonic and nature are mixed in one continuum in which the dividing lines disappear by use of stretching and by drowning one part in another.The uncertainty between boundaries, thus created, gives rise to the potential for multiplicity, for diversity of stretching and contracting. Erasing boundaries between the two elements, the outside and the inside, full and empty, results in an uninterrupted continuum of the relationship between the natural and the created, landscape that is whole, even, homogeneous and, in its search, infinite. An architecture of multiplicity appears where everything is interpreted and redefined, but of which we never see entirety. Tutor(s)