Pope Francis to set off on challenging 12-day Asia-Pacific tour

Pontiff's itinerary, including visits to Indonesia and Papua New Guinea, reflects importance of Asia to Catholic church

Pope Francis is to embark on the longest, farthest and perhaps most challenging trip of his pontificate as he begins a 12-day Asia-Pacific tour that is expected to highlight environmental threats, emphasise interfaith dialogue and reinforce the importance of Asia for the Catholic church.

The 87-year-old will set off on Monday on a tour taking in Indonesia, Papua New Guinea, East Timor and Singapore, a trip that will clock up more than 20,000 miles by air.