In 1137, the County of Barcelona and the Kingdom of Aragon were unified under a single dynasty, creating what modern historians call the Crown of Aragon; however, Aragon and Catalonia retained their own political structure and legal traditions, developing separate political communities along the next centuries.
I 1137, Grevskabet Barcelona og Kongeriget Aragonien blev samlet under en enkelt dynastiet, skabe, hvad moderne historikere Aragoniens krone; men, Aragonien og Catalonien har bevaret deres egen politiske struktur og juridiske traditioner.