Koločep, situated in immediate proximity of Dubrovnik, although small in proportion and low in population, is an island that is highly abundant with examples of the pre-Romanesque architecture. That architectural style is illustrated by six examples. The ruins of churches of Saint Frano in Jekavac, Saint Barbara in Borje, Saint Srđ in Bige and Saint Mihajlo in Donje Čelo. As well as the reconstructed church of Saint Nikola on the island's graveyard and by the completely preserved church od Saint Antun Padovanski in Gornje Čelo. These single-naval churches are of smaller proportions. Their nave is divided in three parts with a dome situated inside a cuboid structure rising above the middle one. The nave on the eastern side of these churches ends in a semicircular apse, framed by a rectangular structure. Based on these architectural characteristics, churches of Koločep are included in the southdalmatian singlenaval domed church typology. The first part of this paper presents a thorough review of architectural characteristics, liturgical installations, suggested dating and names of these churches in form of a catalogue, while the second part focuses on general characteristics of churches that are a part of southdalmatian single-naval domed typology. These criteria are used to try and confirm, or even suggest, the appurtenance of the Koločep's churches to this typology. The goal of this paper is to emphasize, through exhaustive reviews of the characteristics of Koločep island's pre-Romanesque churches, the importance of conservation and also of further research, so that certain facts about them would not be based entirely on assumptions