Complex sentence: Pope Paul VI discontinued the use of the papal slippers but continued to wear the red outdoor papal shoes, which were abandoned by Pope John Paul II in favour of cordovan brown leather walking shoes made in his native Poland.
Split into simpler sentences: Pope Paul VI discontinued the use of the papal slippers. However, he did continue to wear the outdoor red papal shoes, which were abandoned by Pope John Paul II in favor of his favorite cordovan brown leather walking shoes made in his native Poland.