They soon established a construction workshop in the leafy gardens of the former prince-bishops, a foundry with two cupola furnaces and later a first coke blast furnace.
The 'Lion's Mound' iron parts were cast here in 1826, and John Cockerill built the first Belgian steam locomotive at the end of 1835. After he died in 1840, the workshops continued to churn out steam engines, ship lifts, rails, etc.