In 1391 Duke Johann II (the Iron) gave the large forests surrounding Kosztowy, Imielin and Gross Chelm to the Bishop of Kraków.
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Since the bishops were also civil administrators of their areas, Kosztowy did not become part of Silesia until 1742.
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In the course of a major re-organisation of municipal borders in Upper Silesia it was incorporated into Mysłowice together with Wesoła and Dziećkowice.
Kosztowy |
Imielin, like the neighbouring villages of Kosztowy and Chełm Śląski was nevertheless isolated from the rest of the duchy by the dense forest which were a feature of the area formed by the sources and headwaters of the Kłodnica and Mleczna rivers.