The battle of Muret played a significant role in ending the Aragonese interests in territories north of the Pyrenees Mountains. Later, by the Treaty of Corbeil (1258), James I of Aragon, Peter’s son and heir, renounced his claims to the Aragonese territories in the south of France, thus abandoning the policy that the Crown of Aragon had hitherto pursued across the Pyrenees.

In exchange for the abandon of the Aragonese rights in Languedoc, the king of France himself abandoned the ancient Frankish claims of suzerainty over Catalonia, Rosselló (Roussillon) and the other Carolingian possessions in the south of Pyrenees.

After the forced retreat from Languedoc and Provence, the kings of Aragon continued the Reconquista and their expansion eastwards, across the sea, and southwards, along the Mediterranean coast.

The Balearic Islands became a Christian dominion in the first part of the 13th Century and, following the conquest, James I of Aragon created a Kingdom of Mallorca (Majorca) in 1231. In 1279, after a short period of independence, this kingdom was united with the Crown of Aragon.

In the south, a similar scenario: the Aragonese king occupied the territories of the newly established kingdom of Valencia (1238) and united this state too with the Crown of Aragon.

After the conquest, the Balearic Islands and the Valencian kingdom have known a large influx of Catalan-speaking colonists from the Principality of Catalonia and the Catalan language (known later as Valencian in the Valencian kingdom) has been accepted as the official language of these new political entities. This fact explains why the Balearic Archipelago and Valencia became gradually some of the Catalan countries of the Catalan nationalist imaginary.