Bytom - Poland
Bytom is located in south-western Poland on the Oder River. It is one of the oldest and largest industrial cities in the Upper Silesia coal region. Bytom's origins were in the 11th century under the rule of King Boleslaw I the Brave. In the 12th century, lead and silver mines provided its earliest economic base. The town was held by Silesia in the 12th century, and for several centuries it was under various central European powers. Passing to Germany in the mid-18th century. Since 1945 it has become a centre for heavy industry.