Petronilla of Aragon, born on June twenty-ninth, one thousand one hundred thirty-six, was a significant ruler in the Kingdom of Aragon. Her reign began with the abdication of her father, Ramiro II, in one thousand one hundred thirty-seven, and continued until her own abdication in one thousand one hundred sixty-four. During her time on the throne, she played a crucial role in the political landscape of her kingdom.
After stepping down from her position, Petronilla did not retreat from public life. Instead, she took on the important role of regent for her son, Alfonso II of Aragon, from one thousand one hundred sixty-four to one thousand one hundred seventy-three. This period was marked by her influence and guidance as she navigated the complexities of governance during her son's minority.
Petronilla was the last ruling member of the Jiménez dynasty in Aragon. Her marriage to Ramon Berenguer IV, Count of Barcelona, was a pivotal moment in history, as it united the Kingdom of Aragon with the County of Barcelona. This union laid the foundation for the creation of the Crown of Aragon, a significant political entity in medieval Spain.