Medulin Bay is the extreme southern part of the Istrian peninsula and an integral part of the Roman administrative unit of Venetia et Histria. Archaeological research of this space has been intense in the last two centuries, and has almost always been contextualized with research by Pula and the surrounding area. This paper approaches the archeologically systematic and targeted exclusively by the Gulf of Medulin as a unique space important for the economy and life associated with the construction assemblies of Roman villas, both of the economic and marine type. Research in the field as well as research of documentation material contributes to the new valorisation of the coastal and fertile hinterland space by reinterpreting existing ones, but also by interpreting new research results and putting them in the correct and complete historiographical context. This was made possible by the new systematic archaeological research of the Gulf of Medulin conducted from 1984 to 2021 with the application of standardized archaeological researchdocumentation procedures as well as non-destructive remote sensing procedures conducted in 2018. g. The deliberately planned construction of facilities in the Gulf of Medulin in the conditioned economic-political moments of ancient history is based on the analysis of traces of the centuration of the Pula agent. This denies the interpretation of how some parts of the architectural assemblies were created in Stychian in support of the Pula agglomeration. New archaeological research and their historiographical interpretation also bring interesting things about the way of adaptation and the Roman ancient modalities of construction as well as the way the inhabitants are understood, which have not been researched so far. This work achieved the goal of analyzing a total of sixteen archaeological sites of which on the coast (Vižula, Burle, Mukalba, Pomer – s. Giovanni di Fontanella, Pomer – c. Munat, Pomer – s.Andrija, Stupice – Runke, Močila and Školjić, Pineta, Bijeca, Pošesi, Kažela) and on the islands (Ceja, Finera, Levan, Bodulaš), and are archaeologically and historiographical interpreted. This would better clarify the southern part of the ancient Pula ager (Ager Polensis) and the opportunities in it until the arrival of the Slavs and the change of historical, life and social circumstances. The circumstances that led to this expansion of construction, remodelling and adaptation from the 1st century BC were investigated until the end of the 6th century in this space. In a large time, span of seven centuries of life at sites, conclusions are drawn about ways to maintain facilities, changing their purpose, and changing the needs of the population. The ancient period is interpreted as universal and very static in housing models; however, it is on the model of the Gulf of Medulin that it will be shown how much change there has been in one residential and economic micro-areal, due to key historical milestones.