John Paul II was the Polish Pope. He was the first Non-Italian pope in very many centuries. John Paul II reigned a long time and under his rule doctrinal modernisation in the Roman Catholic Church was strongly resisted. John Paul II declared many new Saints, the saintliness of some like Mother Teresa is unclear.
There were many Priest Child Molestation Scandals brewing during the reign of John Paul II who delegated the task of covering things up to his capable deputy, Cardinal Joseph Ratzinger, later, Benedict XVI. Ratzinger did the cover up work thoroughly and efficiently, therefore most scandals didn't come to light till after John Paul's death.