“In-Between” investigates the theme of space architecture, with a particular focus on the design process and the creation of a lunar settlement. For several years, numerous studies have supported the idea of humans returning to and potentially permanently residing on the Moon. This has brought about the need to explore the architectural aspect of the endeavour. Within an engineering-focused context, I attempted to shift the perspective from a general and finite view of space projects to an analysis of the lunar settlement as a composition of specific processes culminating in an architectural design. In this context, the thesis is structured as an investigative journey to establish a connection between the technical and engineering aspects and the socio-cultural dimensions inherent in architectural design.