This article deals with floor mosaics from the territory of Roman province Moesia. The term Moesia is used in this article only as a geographical definition for the territory of today's Serbia, Kosovo and Bulgaria. First, it summarizes the artistic technique as such. The following text describes the types of mosaics. The main part of the article deals with the examples of floor mosaics from the individual sites in the territory of Roman province Moesia and their ideological patterns.