Why is the Archbishop of Lisbon called a patriarch?

Arcbbishop Rui Valerio will become Patriarch of Lisbon on Sept. 2.

When Archbishop Rui Valério is installed Saturday as the new Archbishop of Lisbon, he’ll also get a very cool title — he will be known from then on as Rui I, the 18th Patriarch of Lisbon.

Valério — who was ordained as a Monfortine Missionary and previously served as bishop of Portugal’s military ordinariate — was selected by Pope Francis on Aug. 10 to t…