NIEKTORÉ VÝSLEDKY NEDEŠTRUKTÍVNEJ PROSPEKCIE STREDOVEKEJ SAKRÁLNEJ ARCHITEKTÚRY V NITRE

The paper presents results of GPR measurements in three sites in Nitra “Lower Town”. In two cases they included perished medieval sacral architectures (Church of St. Jacob, Church of St. Michal), while the third one is the still standing, and in use, object (Church of St. Stephen). All the mentioned churches fulfilled an important function in the life of the medieval Nitra. However, there are no relevant written sources for any of them, which would provide satisfactory explanation of the time of their origin. In case of the two perished sacral objects (Church of St. Jacob, Church of St. Michal) not even their exact localisation is known. Therefore the aim of the measurements was mainly to verify possibilities how to identify the architectures and, at the same time, to explore their wider surrounding, with a possibility of detecting the presence of other archaeological objects. The measurement in the area of Svätopluk Square detected the presence of a marked anomaly in places where the tower of St. Goerge´s Church (pulled down in 1882) is assumed to have been standing. The other anomalies which could be associated with the walls of the remaining parts of the church (pulled down in 1786) were not detected. The measurements in the vicinity and in the interior of St. Michael´s Chapel (built in 1739) indicated the presence of older masonries at two areas, probably connected with the perished medieval Church of St. Michael. The measurements carried out in the interior and exterior of St. Stephen´s Church detected the remains of two perished sacristies at the church´s south-eastern side, the existence of a larger crypt in the church´s aisle, foundations of built empore, and indicated the presence of the foundations of the altar mensa.