Llywelyn ap Gruffudd, known as Llywelyn II or Llywelyn the Last, was born in the year twelve hundred twenty and became a prominent figure in Welsh history. He ascended to the title of Prince of Gwynedd in the year twelve hundred fifty-five, marking the beginning of a significant era for Wales.
In twelve hundred fifty-seven, Llywelyn led successful military campaigns across Wales, which culminated in his proclamation as Prince of Wales in twelve hundred fifty-eight. His leadership was recognized by Henry III of England in twelve hundred sixty-seven through the Treaty of Montgomery, solidifying his status as a key ruler in the region.
Despite his achievements, Llywelyn's reign faced challenges, particularly from the encroaching forces of Edward I of England. His life came to a tragic end on the eleventh of December in the year twelve hundred eighty-two, when he was ambushed at Cilmeri, an event that marked one of the final chapters in the conquest of Wales.