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EN
Medieval profiled bricks from the remains of the city parish church of St. Mary Magdalene in Poznań are a very important source of information about the brickmaking craftsmanship. The study attempts to identify production traces with specific stages of brick production (the process of forming and drying bricks), along with an attempt to reconstruct these operations that were used by the Poznań brickmakers. In addition to the analyzes related to the number of occurrences, the type of research material was defined, the criteria for isolating individual traces were described, the state of knowledge about brickmaking and analogies of fittings found in medieval buildings, mainly in the city of Poznań, were taken into account.
PL
During excavations on a site of construction ceramics workshop dated to the end of 12th century found were several objects pointing to its wider activity. These were fragments of three crucibles filled with glass bodies and a waste in form of a glazed and ornamented tile. Physicochemical examinations of glass bodies proved the presence of alkaline lead glass of two chemical types: lead-potassium-silicium (PbO-K2O-SiO2) and lead-potassium-calcium-magnesium-(aluminium)-silicium (PbO-K2O-CaO-MgO-[Al2O3]-SiO2). The workshop was to manufacture complex equipment for a representative building: either a castle or a church.
PL
Wydobywane podczas badań archeologiczno-architektonicznych średniowiecznej architektury ceglanej znaczne ilości tego budulca często noszą różnego rodzaju ślady: powstałe nieintencjonalnie, np. odciski ludzkich stóp czy łap i racic zwierząt, oraz wykonane intencjonalnie, np. rysunki pomocnicze i znaki murarskie. Cegła z zamku w Kowalewie Pomorskim jest fragmentem kształtki żebrowej. Widniejący na niej rysunek nie pasuje do żadnej z powyższych funkcji. Jest to rysunek rzutu czteroramiennego sklepienia gwiaździstego w obramieniu zbliżonym obrysem do kwadratu sferycznego. Prawdopodobnie jest to szkic, przy pomocy którego mistrz tłumaczył pewne zagadnienia innemu rzemieślnikowi. Z informacji źródłowych wynika, że w bezpośrednim sąsiedztwie placu budowy zamków krzyżackich znajdowały się siedziby i warsztaty rzemieślników oraz cegielnie. Trzymano tam także zwierzęta hodowlane, na co wskazują widoczne na cegłach odciski racic kóz, świń itp.
EN
Bricks excavated during archaeological-architectural research of medieval brick architecture often carry various marks and signs: made unintentionally, e.g. prints of human feet or animal paws or hooves, as well as made intentionally, e.g. auxiliary drawings and mason signs. The brick found at the Castle in Kowalewo Pomorskie is a fragment of rib mould. The drawing on it does not fit any of the functions listed above. It is a drawing representing a projection of a four-arm stellar vault in a framing close in its contour to a spherical square. It is probably a sketch, used by a master to explain some issues to another craftsman. Source information shows that brickyards, masons’ abodes and workshops were in direct vicinity of ordensburg construction sites. Livestock was kept there as well, which is suggested by goat and pig hoofprints, visible on the bricks.
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