The Portuguese Constitutional Monarchy was a political system in Portugal that combined a monarchy with a constitution. It began in the early 19th century, particularly after the Liberal Wars, which established a constitutional framework that limited the powers of the monarch and outlined the rights of citizens. The monarchy was represented by the King of Portugal, who ruled alongside a parliament. This system lasted until the early 20th century, when the monarchy was abolished in 1910, leading to the establishment of the Portuguese First Republic. The constitutional monarchy aimed to balance royal authority with democratic principles, influencing Portugal's political landscape during its existence.