The analysis of the spatial layout and the remains of archaeological objects around the Mount of St. Lawrence in Kaldus on the Vistula brings to notice the elements reflecting the structure of the cosmological myth characteristic of the traditional societies. It may be assumed that this place was perceived as an area of meditation and contact of cosmic powers personified, on the one hand, by the uranic deities such as the thundering Perun or the solar Svarog/Svarozic, and, on the other hand, by the chthonic deities such as the guardsman of the other world Veles/Volos. It was believed that at the foot of the Mount of St. Lawrence there was an entrance to the other world, whereas its peak reached the sky. In this context, the location of the first cemetery south of the damp terrain depression is significant. The launch of construction, in the first half of the 11th century, of an early Romanesque basilica on the site of the pagan cult on the northern side of the Mount of St. Lawrence was done on purpose in order to sacralize the pagan offering site, which, by the way, was not very successful. Additionally, we know about the existence in this period of the first, relatively well-dated fortifications signalling the appearance of new social functions that the discussed centre performed as a consequence of incorporation of the territory of the Land of Chelmno to the state of Gniezno and a trial to create, at the foot of the Mount of St. Lawrence, a centre comparable to 'sedes regni principalis'.The original paper published with the German summary.