Pope Leo XIV called Saturday for “structures of solidarity” to help those on the margins as he wrapped up his visit to Cameroon and headed to Angola on the third leg of his four-nation African odyssey.

Leo celebrated Mass at Yaounde Airport before an estimated 200,000 people, including President Paul Biya, 93, the world’s oldest leader. The jostling, joyful atmosphere underscored the joy the third pope to visit Cameroon has brought to the former French colony, where around a third of the population is Catholic.