Inside the Archaeological Park, in the north-eastern part of the city of Kaulon, are the ruins of a church, called St. Mark’s by the local tradition.
It is a building of modest dimensions, whose apse was destroyed during the construction of the road. It retains, however, the southern perimeter wall, on which there are three little splayed windows.
For its construction, it was hypothesized a date between the Vth and VIth century B.C.: it would therefore be one of the oldest Byzantine churches in Calabria.
The degree of urbanization of the San Marco area in the late antique period is documented by fragments of pottery and coins and by the discovery of a tomb, which attests to the presence of a necropolis. In this same area gather finds from the Roman period, which are arranged in a period of time ranging from the second half of the second century B.C. to the late imperial age. The area was probably the site of a housing complex with an adjoining necropolis, of which two graves have been found. These data seem to confirm the hypothesis already proposed by Orsi that the statio Stilida remembered in the Itinerarium Antonini Augusti Maritimum would rise on the site of the ancient Greek colony of Kaulon. This registers stations on the ancient coastal road linking Crotone to Reggio, a road whose path was not to be very different from State Highway Jonica 106.
Below the church was found a large quadrangular plan room, originally equipped with a mosaic floor, dating, in its first installation, to the imperial age. After an initial abandonment in the third century A.D. and a subsequent phase of resettlement, the building collapsed between the IV and V century, perhaps due to natural causes. The church of San Marco was built directly on the collapsed structures, between the V and VI century.
The excavations in the Archaeological Park of Kaulon resumed in 2003 and identified substantial remains of structures belonging to different periods in the area of settlement downstream of the remains of the little church.
The “House of the grotesque character” can be dated around 475 B.C.; it owes its name to the discovery of a matrix for the production of earthenware figurines perhaps caricatural of Heracles. Consisting of two large rooms opening onto a large courtyard, it contained household furnishings and architectural ornaments that seem to allude to the high social level of its owners and which testify to the full involvement of the city in the main commercial circuits of the period.
Archaeological finds attest, therefore, in this site, the presence of a settlement that, discontinuosly, lived from the late middle geometric period (mid-eighth century BC) until late antiquity (VI-VII century AD).