Vatican City | Pope Francis will visit Indonesia, East Timor, Papua New Guinea and Singapore in September, the Vatican announced Friday, confirming the longest trip of Francis' papacy that is sure to test his health, stamina and mobility.

The Vatican confirmed the September 2-13 visit, saying the 87-year-old pope would visit Jakarta, Indonesia; Port Moresby and Vanimo, Papua New Guinea; Dili, East Timor; and Singapore. Further details will be announced later.

Francis, who had part of one lung removed as a young man, had to cancel a planned visit to Dubai late last year after he came down with a bad case of bronchitis. He suffered from respiratory problems all winter and had to curtail his participation in Holy Week events to save his energy for Easter.

Francis has also been using a wheelchair for nearly two years because of bad knee ligaments, and has said that travelling has become increasingly more difficult.