Foundation and First Mentions
The history of Viseu is rooted in deep antiquity, beginning with Iron Age settlements ("Castro" culture). However, it formed as a fully-fledged urban centre during the Roman Empire era. The Romans, appreciating the strategic location of the area, founded a city here, which is mentioned in historical sources as Vissaium.
The city is inextricably linked with the legendary figure of Viriato — the leader of the Lusitanians, who heroically resisted Roman expansion. Although his exact birthplace remains a subject of debate, Viseu is traditionally considered the centre of his heritage, which is reflected in local monuments and the name of the ancient earthen fortification "Cava de Viriato".
Key Factors of Formation
The development of Viseu was driven by a combination of geographical and political advantages:
- Crossroads: The city emerged at the intersection of crucial Roman roads connecting Emerita Augusta (modern Mérida) and Bracara Augusta (Braga), ensuring a constant flow of goods and people.
- Religious Status: As early as the Visigothic period, in the 6th century, Viseu became the seat of a bishop. This gave the city a high administrative and spiritual status, facilitating the construction of religious buildings, including early versions of the Cathedral.
- Strategic Height: Its location on an elevated plateau in the centre of Portugal made the city convenient for defence and control over the surrounding territories, which was critically important during the wars between Christians and Moors.
Early Cultural and Economic Features
In the Middle Ages, the city's economy was based on agriculture and crafts. The local lands were famous for their fertility, which contributed to the development of viticulture — the foundation of the future famous Dão vineyard region.
A powerful impulse for the economy was the establishment of the Fair of São Mateus by King John I in 1392. This event secured Viseu's status as the main trading hub of the region. The fair, which has existed for more than six centuries, is considered one of the oldest on the Iberian Peninsula and shaped the city's unique commercial traditions.