I'm wainting for a few new unesco cards in the next days. I don't need to wait for this one anymore, because it arrived last it from Sweden and it was sent by Merja. The Engelsberg Ironworks is listed as a Unesco World Heritage Site since 1993.
Engelsberg is an outstanding example of an influential European industrial complex of the 17th-19th centuries, with important technological remains and the associated administrative and residential buildings intact. It is the best preserved and most complete example of a Swedish iron-working estate, of the type which produced the superior grades of iron, using primitive smelting furnaces, that made Sweden the economic leader in this field for two centuries, from at least the end of the Migration Period. - in: www.whc.unesco.org/en/list/556