Key Facts
- Siege duration
- Approximately 2 months (May–June 1142)
- Previous Leonese capture
- 1079, by Alfonso VI
- Lost to Almoravids
- Shortly after 1109 (death of Alfonso VI)
- Failed prior siege
- July 1138; general Rodrigo Martínez killed
- Surrender terms
- 30-day relief window; surrendered peacefully when no aid came
Strategic Narrative Overview
Alfonso VII had already failed to take Coria in July 1138, losing his general Rodrigo Martínez in the attempt. Returning in May 1142 with engineers and improved siege equipment, he ordered construction of a wooden tower overtopping the walls, alongside catapults and mantlets used to undermine fortifications. The defenders—Almoravid troops and local Muslims—sealed the gates with reinforcing walls, but famine set in rapidly as the siege wore on through June.
01 / The Origins
Coria, a fortified town on the western frontier of Iberia, had been part of the Reconquista's contested borderlands for decades. Originally taken by Alfonso VI of León in 1079, it fell back to the Almoravids—the North African Muslim dynasty—sometime after his death in 1109. Alfonso VII, styling himself Emperor of all Spain, viewed its recovery as essential to projecting Leonese power southward into al-Andalus and consolidating his imperial authority.
03 / The Outcome
With starvation mounting, the Almoravid garrison offered to surrender if no external relief arrived within thirty days. Letters appealing to the kings of al-Andalus went unanswered, and the garrison capitulated peacefully, yielding the city along with captives and riches. Alfonso refounded the Diocese of Coria, appointing Bishop Íñigo Navarro, then marched to Salamanca. The victory launched at least eight further imperial expeditions into al-Andalus.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Alfonso VII of León, Ponce Giraldo de Cabrera, Ponce de Minerva.
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.