868 - Establishment of the 1st County of Portugal, a fiefdom of the Kingdom of Asturias, by count Vímara Peres, after the reconquest from the Moors of the region between the Minho and Douro rivers. Count Vímara Peres founded the fortified city that bears his own name Vimaranis, later Guimaranis, present day Guimarães, considered "The Cradle City" of Portugal.
873 - Vímara Peres dies and is his son Lucídio Vimaranes becomes Count of Portugal. After his death the county passes to the hand of Diogo Fernandes, through marriage with Lucídio's daughter Onega Lucides.
871 - The city of Coimbra is reconquered from the Moors. Hermenegildo Mendes is made Count of Coimbra.
878 - The region of Coimbra (today, Central Portugal) is incorporated in the Kingdom of Asturias by the Count Hermenegildo Guterres.
*Mendo Gonçalves I (also know as Hermenegildo Gonçalves, son of Count Gonçalo of Galicia) marries Mumadona Dias (daughter of Onega Lucides and Diogo Fernandes) and becomes Count of Portugal.
*Vikings raid Galicia and kill the bishop of Santiago de Compostela in battle, but his successor St. Rudesind rallies the local forces and kills the Viking King Gundered.
976 - CaliphAl-Hakam II dies, and Al-Mansur Ibn Abi Aamir takes over in the name of his protégé Hisham II, becoming a military dictator usurping caliphal powers and lauching a big number of offensive campaignes against the Christians.
*Al-Mansur Ibn Abi Aamir seizes the castles north of the Douro river, and arrives at the city of Santiago de Compostela. The city had been evacuated and Al-Mansur burns it to the ground and destroys the Church of Santiago.
*Count Gonçalo Mendes takes the personal title Magnus Dux Portucalensium (Grand-Duke of Portugal) and rebels against King Bermudo II of León, being defeated.
1056 - The Almoravides (al-Murabitun) Dynasty begins its rise to power. Taking the name "those who line up in defense of the faith," this is a group of fundamentalist BerberMuslims who would rule North Africa and Islamic Iberia until 1147.
1058 - Emir Al-Muzaffar al-Aftas (Abu Bekr Muhammad al-Mudaffar - Modafar I of Badajoz, Aftid Dynasty) pays the Christians to leave Badajoz, but not before Viseu being conquered by Ferdinand I of Castile-León.
*Ferdinand I of León-Castile besieges MuslimCoimbra from 20 January until 9 July . The Muslim governor who surrendered is allowed to leave with his family, but 5,000 inhabitants are taken captive, and all Muslims are forced out of Portuguese territory across the Mondego river.
*The Mozarabic (Christian) general Sisnando Davides, who lead the siege of Coimbra, becomes Count of Coimbra.
1071 - Garcia II of Galicia becames the first to use the title King of Portugal, when he defeates, in the Battle of Pedroso (near braga), Count Nuno Mendes, last count of Portugal of the Vímara Peres House.