Pope Leo will inaugurate the soaring central tower of Barcelona’s famed Sagrada Familia basilica when he visits Spain next month in a weeklong trip that will also take him to a migrant reception centre in the Canary Islands, the Vatican said on Wednesday.

The June 6-12 visit will first bring Leo to Madrid for meetings with the government, parliament and King Felipe VI and Queen Letizia. He will also preside over a prayer vigil with young people that will recall the last time a pope visited Spain: 2011, when Madrid hosted World Youth Day with Pope Benedict XVI.

In Barcelona, Leo will be on hand to mark the 100th anniversary on June 10, of the death of Catalan architect Antoni Gaudí, who designed Sagrada Familia, the world’s tallest church. Leo will celebrate an evening Mass in the basilica and inaugurate its Tower of Jesus Christ, the soaring central piece that was moved into place in February.

The tower brought Sagrada Familia to its maximum height, 172½ metres (around 566 feet) above Barcelona, but the building is still far from complete. When Benedict visited in 2010, he consecrated the basilica, and there will still be unfinished related business when Leo visits: Gaudí is on the path to possible sainthood, but he will not be canonised during the pope’s trip, Spain’s bishops said on Wednesday.

The head of the Spanish Catholic bishops conference, Archbishop Luis Argüello of Valladolid, highlighted Leo’s planned address to parliament while in Spain as particularly significant. Only on rare occasions do popes address foreign legislatures, and the speeches often end up among the most noteworthy of a pontificate.