Significant changes in the way of life of local peoples happened with the establishment of the Roman dominion on the Eastern Adriatic coast and they are evident in the increased urbanisation of settlements, application of new building techniques, strengthening of trade, changes in economy but also in the influx of large number of people from other parts of the Roman Empire. Territory of the southern Liburnian, the most urbanized region in the Eastern Adriatic, was an essential component of such changes. The first step after the pacification of the said territory was its administrative-legal organization and the resolution of property-legal issues between communities, which was of crucial importance in order to allocate land to newly-settled population. Rural villas were built within the ager of the territorial communities and production of various goods intended for local but also foreign markets was organized there. In this dissertation, on the basis of the collected data, basic information is brought forward on the distribution of Roman rural architecture in the ager of colonial Aider and municipal centres in the territory of southern Liburnian during the period from the Early Empire to the Late Antiquity. Two hundred and sixty sites, displaying characteristics of Roman rural architecture of varying state of preservation, have been studied within the analysed territory. Apart from the landscape, the network of well-built land communications had a decisive role in their distribution. In order to attain insight into the way of life in the territory outside of the urban areas, along with the remains of rural architecture, building techniques and their inner decorations, this paper deals with other segments of everyday life, like burial rituals and religious beliefs. During the 3rd and 4th centuries, as an indirect consequence of frequent war conflicts, fundamental political and economic changes arose in the Roman Empire, which reflected in the changes of essential functions of rural estates. More concrete conclusions on the changes within rural estates in the territory of southern Liburnian cannot be given based on the current state of research on the remains of Roman rural architecture in the said area. However, it is evident that numerous structures during the 5th and 6th centuries were under the influence of Christianization.