Extra:Muros:Intra: Into the Heart of Quantum Matter is a phenomenological investigation in design processes between digital and physical space. As the physical landscape changes with the hybridization of digital communications, classical concepts of Cartesian and Newtonian space are disrupted in non-classical, quantum indeterminacies. The research involves an interdisciplinary study of quantum physics and contemporary architecture in two phases: the first phase is a comparative analysis of spatial theory in modern architecture and quantum physics starting from the 20th century, and the second phase entails a research-creation prototype in the form of an experiential display, installed in a site-specific public location for 9 days. An analysis of quantum space theory is evaluated in the literature and materialized in the display through a variety of methods: a comparative literature study, observation and documentation, a sample study interviewing participants, and a reflective practice, through which the design process is assessed.