The Basílica de la Sagrada Família in Barcelona, Spain, reached a historic milestone on October 30, 2025. With the placement of the first part of a cross atop the Tower of Jesus Christ, it became the world’s tallest church. Rising 534 feet (162.91 m), it now surpasses Germany’s Ulm Minster, which had held the record since 1890. Despite this achievement, the structure, under construction for over 140 years, is far from complete.