The paper discusses the historical circumstances of the arrival of the Frankish Kingdom in the territory of early medieval Croatia and the social, ecclesiastical and political Frankish influences on our area resulting from the Carolingian project of restoring Christianity thanks to the activities of missionaries who carried with them the traditions of the Empire. The categories of Frankish influences on our area are considered, as well as their active role and the way in which they were incorporated into our culture, defined it and shaped new forms of behavior and action. Some representative localities stand out, which clearly outline these influences and justify the Frankish role in the Christianization of our area, with the finds in graves, the shape and function of the churches built or renewed, the church furniture and Latin epigraphic inscriptions on them, or the liturgy in early medieval Croatian churches. At the same time, the role of the Aquileian area in the overall Christianization of the Croatian area is elaborated, given that most of the Frankish missionaries sent to our area actually came from the north of Italy and the area under the jurisdiction of the Aquileian church. In the light of the Frankish influence in the development of saint cults in early medieval Croatia, the Frankish saints whose cult was renewed or developed under the auspices of the Franks are treated in more detail, information about them is provided and localities where their titular is present are listed.