Yusuf ibn Tashfin
On 15 March 1087 Sisnando dictated a testament "in procinctu" on the occasion of his leaving for a campaign with Alfonso against Yusuf ibn Tashfin, the Almoravid general. Sisnando died on 25 August 1091, after more than twenty years of semi-independent rule at Coimbra. He was buried in the Old Cathedral of Coimbra and was succeeded by his son-in-law Martim Moniz de Montemor.