Co-Bilitsa is a proposal for revitalisation of a central residential zone in Sofia through a strong bonded dialogue between contemporary architectural design and centuries-old traditions and culture. The project's main goal is refinement of the social, building, and environmental conditions by intervention in the local context characterised by socialist architectural background. The concept is formed as an antipode to this background and relies on the richness of customs and heritage for creating a building with a unique visual presence and strong impact on the city.