The Ethiopian, especially the Tigrian Region, society had been using earth as a construction material since days which cannot be traced back. They chiselled and curved their important shelters out of Mountains. These spaces proved themselves to be of outstanding construction wisdom that they are habitable and sustainable today as they were years ago. Besides the context, Mother Nature had always been the perfect building construction material for ages in different parts of the world where our instinct human nature led us to. The basic comparison to be discussed in this paper will be the case of Sassi Matera, Italy and Tigray, Ethiopia. These locations are known to be one of the first human settlements in the world with same type of structures. This research will find similarities of sustainability among the two regions in their settlements, culture, Religion and ‘Being’. Study 1 focused on grouping these construction techniques of both locations into different groups based on their typologies. After exploring some of the typologies from each regions, similar typologies from each were filtered out and further studied. Study 2 Focused on Literary sources of studies and Found that ‘Being’ to be the basic source of knowledge in Ancient construction techniques. Study 3 Examined the role of Religion and Culture in the regions for the development of ‘Being’ and its impacts on knowledge development as ‘Being in the World’. Study 4 Emphasizes on
the importance of Hermeneutic Phenomenology as a knowledge management strategy for sustainable development in the built environment in a globalised setting. The Research findings will be useful in understanding knowledge as ‘Being’ and ‘Being in the World’ for sustainable developments. It also brings us back to translating existing knowledge of a new/modern yet sustainable, an old/ancient yet long-lasting approach to creating the new sustainable development intended in the country or even worldwide.