Eleven polyconch churches in Dalmatia represent a striking architectural type characteristical for Croatian pre-Romanesque architecture. Due to different political and cultural influences, it does not come as a surprise that polyconch churches found their place alongside the east coast of the Adriatic. They represent the product of a local legacy manifested from the mix of ancient, early Christian, and Byzantine styles. Geographically, they are scattered around the cities of Byzantine Dalmatia up to the early medieval Croatian to Zahumlje. They were built mostly around the period of the 8th to the 11th century on the sites of former ancient or early Christian buildings that primarily served as a source of building material. Using the same construction technique, from craved crushed stone in abundant mortar, these polyconch churches were built. Just like all central building and their main prototype – the baptistery in Zadar, these churches were also vaulted. The main thing that these churches have in common is a circular core surrounded by six or eight conchs, but they differ from each other in the visuals of the outer mantle as well as the appearance of an entrance conch that has a rectangular entrance field instead of a semicircular one. The first part of this paper contains a catalog of polyconch churches in which each catalog unit, each church is described in more detail, while the second part is based more on the description of the characteristics of the churches through the floor plan, architectural models, the problem of function and dating, and the inner organization of the sanctuary. The goal of this paper is systematization and analysis of previous researches on polyconch churches in Dalmatia, and consequently, an incentive for further researches which are needed to valorize this significant architectural type of Croatian cultural heritage as well as to get the general population to know of them.