İki, a practice based in Ankara, Turkey, has designed a competition proposal for an Concert Hall and Art Center for Ankara, capital city of Turkey. The competition challenged participants to see architecture regarding a complex which consists a Local Municipality Building, Art Center, theatre hall and a big concert hall which will be made by remembrance of the famous Turkish classical musician “Ulvi Cemal Erkin” . The collaborative effort within the office, led by Hakan evkaya and Kutlu Bal, produced a proposal which has been combined all these functions in a one big box. Thus the outer space for city could be maximized. All basic functions have been gathered by a core in the middle of the building. Waiting halls and circulation has been arranged around the core vertically. All system has been cladding by transparent façade which let the vision outside and inside. The relations with main street, across the street and the activity zone which is an part of the design was so important.