Following up economic developments started in mid-19th century and given the momentum of the Spanish internal market after the end of the fueros , Biscay developed its own modern blast furnaces and heavier mining .
Industrialization took off in Gipuzkoa .
Following up economic developments started in mid-19th century and given the momentum of the Spanish internal market after the end of the fueros , Biscay developed its own modern blast furnaces and heavier mining , while industrialization took off in Gipuzkoa .