Wykorzystanie w przeszłości darniowych rud żelaza jako materiału budowlanego

The article discusses certain objects built of bog iron ore or erratic boulders and bog iron ore, mainly in the western part o f the country. Attention is drawn to the fact that bog iron ore was applied as building material in Ostrow Lednicki already at the turn of the tenth and eleventh century. During the thirteenth century, it was used for the erection of Gothic churches in the environs of Nowa Sol in the region of Lubusz. In the second half of the nineteenth century, it was revived as a local building material.