History of Medieval Catalonia: From Marca Hispanica to the Crown of Aragon

The Islamic Invasion and the Marca Hispanica

In the 8th century, Muslim forces invaded the Iberian Peninsula and conquered Ebro and Catalonia. By the 9th century, with the help of Frankish kings, the northern region of Catalonia expelled the Arabs.

• Catalunya Vella (Old Catalonia): This region was never Islamicized.
• Catalunya Nova (New Catalonia): The territories in the south and west remained under the control of Al-Andalus for over 300 years, including the Taifas of Tortosa and Lleida.

Preserved Islamic Heritage

Notable buildings of Islamic origin preserved in Catalonia include La Seu Vella, various castle walls, and Siurana.

The Marca Hispanica and the Counts of Barcelona

Frankish warriors entered Catalan territory to protect the southern border of their kingdom against the Muslims, establishing the Marca Hispanica—a protective strip from Pamplona to Barcelona. By the 9th century, the role of the Catalan counts became a hereditary office.

Wilfred the Hairy, Count of Barcelona, Girona, Urgell, and Cerdanya, began the dynasty that ruled the County of Barcelona.

Independence from France

When Almanzor looted and destroyed Barcelona in 985, Borrell II requested help from the King of France. After being denied assistance, Borrell II decided not to renew his oath of allegiance, effectively establishing independence.

Feudalization and Social Change

Feudalization in Catalonia arose from the need to protect the land. Nobles began acting without the authority of the count, leading to a violent appropriation of strongholds and lands. Eventually, Ramon Berenguer imposed his authority through a pact: nobles and their vassals were recognized, and in exchange, the count accepted that the position of Baron became hereditary.

The Parias were tax payments used by the Counts of Barcelona and Urgell to strengthen military power, build castles, and improve weaponry. During the 11th century, the Count of Barcelona conquered several cities: Tàrrega (1056), Agramunt (1078), Balaguer (1105), and Tarragona (1117).

The Formation of the Crown of Aragon

The Dynastic Marriage

King Ramiro II of Aragon arranged the marriage of his daughter, Petronila, to Ramon Berenguer IV, the Count of Barcelona. After the wedding, Ramiro II returned to his monastery, and Ramon Berenguer IV was appointed Prince of Aragon to govern the kingdom.

The Conquest of New Territories

The union of Catalonia and Aragon led to political empowerment and combined military strength. Once the matrimonial alliance was consolidated, Ramon Berenguer IV utilized this increased military power to launch a major expedition to conquer the Taifas of Lleida and Tortosa. In 1153, Siurana, the last Muslim stronghold in Catalonia, finally surrendered.