Pope Leo XIV will bless the Sagrada Familia's newly completed central tower in Barcelona, marking his first papal visit to the iconic basilica. The five-story glass-and-ceramic cross crowning the tower makes it the world's tallest church, representing the culmination of 144 years of construction since Antoni Gaudí's death in 1926.

While religious leaders celebrate the architectural milestone, local residents fear the expansion threatens their homes. The church foundation plans to build a walkway connecting the unfinished Glory Facade to the street, potentially requiring demolition of entire city blocks. Salvador Barroso of the Association of Those Affected by the Sagrada Familia organized black ribbon protests during the papal visit, arguing that displaced families cannot afford soaring rents in an already strained housing market.

The controversy highlights Barcelona's struggle with overtourism and urban development. Five million annual visitors generate significant revenue for the foundation, but also drive up property values and rents, pushing longtime residents out. City officials envision the basilica as a European Taj Mahal, yet acknowledge the foundation must cover any relocation costs.

Political tensions add another layer as Spain's atheist Prime Minister Pedro Sánchez attends the Mass despite criticism from opponents who view it as opportunistic. The papal ceremony temporarily unites polarized forces, but cannot resolve the fundamental conflict between preserving Gaudí's vision and protecting community housing rights.