Major Mining Sites of Wallonia

Lore & Background

During the Industrial Revolution in the 19th century, mining and the heavy industry that relied on coal formed a major part of Belgium's economy. Most of this mining and industry took place in the sillon industriel ('industrial valley'), a strip of land running across the country where many of the largest cities in Wallonia are located. The four sites of the World Heritage Site are all situated in or near this area.

The site features early examples of utopian architecture from the early periods of the industrial era in Europe within a highly integrated, industrial and urban ensemble. Notably, the Grand-Hornu colliery and workers' city were designed by Bruno Renard in the first half of the 19th century. Bois-du-Luc includes numerous buildings erected from 1838 to 1909 and one of Europe’s oldest collieries dating back to the end of the 17th century.

The mining sector in Belgium declined during the 20th century during deindustrialization, and today the four mines are no longer operational. They are each open to visitors as museums and are an important part of Belgian industrial heritage.

Reader's Guide

The Major Mining Sites of Wallonia represent a key chapter in European industrial history, preserving the physical remains of the coal mining industry that powered Belgium's economy during the 19th and 20th centuries. While the Walloon region had hundreds of collieries, most have lost their infrastructure, but the four components of the listed site retain a high measure of integrity. Their recognition as a UNESCO World Heritage Site in 2012 underscores their global significance as examples of early industrial architecture and urban planning, including the utopian workers' city at Grand-Hornu designed by Bruno Renard. The sites also illustrate the broader historical context of the sillon industriel, the industrial valley that shaped Wallonia's development. Today, as museums, they serve as educational resources and tourist attractions, preserving the legacy of an industry that once dominated the region. Their inclusion in the compendium highlights the importance of industrial heritage in understanding the social, economic, and architectural transformations of the modern era.

Did You Know?

• The four sites form a strip 170 km long by 3 to 15 km, crossing Belgium from east to west.
• Bois-du-Luc includes one of Europe’s oldest collieries, dating back to the end of the 17th century.
• The Grand-Hornu colliery and workers' city were designed by Bruno Renard in the first half of the 19th century.
• The mining sector in Belgium declined during the 20th century due to deindustrialization.