EN
The identification of stone material in ancient monuments upon the basis of macroscopic estimations or data obtained from historical documents is often deceptive. An adequate set of data in the form of a data bank concerning the mineral composition and structure of stone materials, proves to be of great help. In order to elaborate such a set, the mineral composition of selected sandstones used in old buildings in Polish territories has been examined. The obtained results concerning the mineral composition and structure of the sandstones explain some of their technical features such as imbibition.