In the basin of the Awirs stream, there are traces of alum workings from the 17th and 18th centuries. This alum activity is also found in Flémalle-Haute and Flémalle-Grande, with alum mines exploited from the 16th to the 18th century. This interest in the industry began in the 15th century with the Saint-Pierre chapter that operated numerous quarries. The parish of Saint-Mathias, in 1762, replaced the former..
in the basin of the awirs stream there are traces of alum workings from the 17th and 18th centuries this alum activity is also found in flémalle-haute and flémalle-grande with alum mines exploited from the 16th to the 18th century this interest in the industry began in the 15th century with the saint-pierre chapter that operated numerous quarries the parish of saint-mathias in 1762 replaced the former