This paper examines interlace sculpture primarily from Lobor, while also considering pieces from Sisak and Slivnica, placing them in the context of the Christianization of the region south of the Drava River following the Frankish conquests. It highlights the role of Aquileia as a missionary center in this process. The study is based on the material remains of early medieval liturgical stone furnishings discovered at these sites. Analysis of the sculptures reveals stylistic and iconographic parallels with pre-Romanesque monuments from the northern Adriatic and the former Lombard Kingdom, indicating the presence of stonemasons connected to Aquileian missionary circles. Lobor is particularly notable, as archaeological research demonstrates a multi-phase continuity of sacred construction from early Christianity through the Middle Ages. The paper also compares the historical context with Carantania, where interlace sculpture is associated with local Slavic princes Christianized under Salzburg missionary activity. Based on these analogies, it is proposed that the churches in Sisak and Lobor were part of a comparable political-religious strategy by local Slavic elites under the influence of Aquileia during the first half of the 9th century.