Ferdinand I’s Campaign in the Duero and…

Ferdinand I’s Campaign in the Duero and Mondego Valleys (1057–1064 CE)

King Ferdinand I of León and Castile begins his first major campaign of the Reconquista by expanding southward into the lower basin of the Duero, securing the lands between the coast (held by León) and the mountains.

The Conquest of Lamego and Viseu (1057–1058 CE)

• On November 29, 1057, Ferdinand’s forces capture Lamego and its surrounding valleys, securing a foothold in the upper Douro region.
• With the Duero under control, he pushes southward, taking Viseu, a key fortress in the Mondego Valley, on July 25, 1058.

The Siege and Conquest of Coimbra (1064 CE)

Ferdinand then sets his sights on Coimbra, a major stronghold at the mouth of the Mondego River. The siege lasts six months, with chroniclers describing it as “a long and grueling battle”.

Finally, on July 25, 1064, Coimbra falls to Ferdinand’s forces, marking a major milestone in the Christian reconquest of Portugal. He establishes Coimbra as his headquarters for future military campaigns, positioning it as a key base for the expansion of Christian control into Gharb al-Andalus.