The door is made of pine wood, and has a single leaf with four panels. The leafs dimensions are 182 x 98 cm. Doors of this type were used as early as in the times of antiquity. In Poland, they appeared by the end of the 15th century. A similar door existed in the attic of the building at ul. Wrocławska 16 in Poznań in the 18th century. Many examples have survived in Germany. Iron fittings are the characteristic dating feature. The form of the hinges of the Kórnik door is very similar to that of the hinges used in the door in the 18th century manor house at ul. Szyperska 9 in Poznań. The manor house is a well-preserved example of architecture from this period. Colour is a vital element of research. The original layer at the side of the dwelling room was green. Morphological analysis has dated it to the turn of the 19th century. The above was confirmed dendrochronologically - the timber was cut after 1787. The joinery is of considerable importance for research in the fields of architecture and our material culture.