During the excavations, it turned out that all the buildings in the Castle courtyard were heated with tile stoves. After the restoration, the researchers were able After the restoration, the researchers were able to distinguish two types and about thirty varieties of Lida tiles, from which the main surface of the furnaces was cladded with.
The first type of tile is pot-type tile, which originally had the shape of a pot. In the XIV – the first half of the XVI century there were installed simple adobe stoves in the housing accommodations of the Lida Castle. They were small vaulted structures with specially mounted pot-type tiles and served as heaters.
Step by step, the upper part of the tile (mouth), made in the form of a circle, got a different shape: first four-petalled rosette, then the shape of a square. In the XVI century pot-type tiles with a square (mouth) began to be covered with green glaze.