Afonso Henriques in the context of "Henry, Count of Portugal"

Lisbon, officially the Very Noble and Ever Loyal City of Lisbon, is the capital and most populous municipality of Portugal, with an estimated population of 575,739, as of 2024, within its administrative limits and 3,028,000 within the metropolis, as of 2025. Lisbon is mainland Europe's westernmost capital city (second overall after Reykjavík), and the only one along the Atlantic coast, the others (Reykjavík and Dublin) being on islands. The city lies in the western portion of the Iberian Peninsula, on the northern shore of the River Tagus. The western portion of its metro area, the Portuguese Riviera, hosts the westernmost point of Continental Europe, culminating at Cabo da Roca.

Lisbon is one of the oldest cities in the world and the second-oldest European capital city (after Athens), predating other modern European capitals by centuries. Settled by pre-Celtic tribes and later founded and civilized by the Phoenicians, Julius Caesar made it a municipium called Felicitas Julia, adding the term to the name Olissipo. After the fall of the Roman Empire, it was ruled by a series of Germanic tribes from the 5th century, most notably the Visigoths. Later it was captured by the Moors in the 8th century. In 1147, Afonso Henriques conquered the city and in 1255, it became Portugal's capital, replacing Coimbra. It has since been the political, economic, and cultural centre of the country.

The Battle of Ourique (Arabic: معركة أوريكه) took place on 25 July 1139, in which the forces of Portuguese count Afonso Henriques (of the House of Burgundy) defeated those led by the Almoravid governor of Córdoba, Muhammad Az-Zubayr Ibn Umar, identified as "King Ismar" in Christian chronicles.

Theresa (Portuguese: Teresa; Galician-Portuguese: Tareja or Tareixa; Latin: Theresia) (c. 1080 – 11 November 1130) was Countess of Portugal, and for a time claimant to be its independent Queen. She rebelled against her half-sister Queen Urraca of León. She was recognised as Queen by Pope Paschal II in 1116, but was captured and forced to accept Portugal's vassalage to León in 1121, being allowed to keep her royal title. Her political alliance and amorous liaison with Galician nobleman Fernando Pérez de Traba led to her being ousted by her son, Afonso Henriques, who with the support of the Portuguese nobility and clergy, defeated her at the Battle of São Mamede in 1128.

Viseu, officially the City of Viseu, is a city and municipality in the Central Region of Portugal and the capital of the district of the same name, with a population of 103,502 inhabitants in the entire municipality, and center of the Viseu Dão Lafões intermunicipal community, with 267,633 inhabitants.

Settled during the period of the early Iberian Castro culture, the territory of Viseu was occupied by a series of other peoples including the Romans, Suebians, Visigoths and Moors. During the Roman occupation of Iberia, Viriathus, the rebel leader of the Lusitanians, is assumed to have lived for a time in the vicinity. During the Middle Ages, the city often served as a seat for Visigothic nobles (such as King Roderic), and based in the Chronica Gothorum is one of several probable birthplaces for Afonso Henriques, first King of Portugal.