The completion of the Sagrada Familia's central towers has been made possible through the innovative use of Loctite EA 9497 adhesive, which allows stone and steel to function as a single material. This collaboration between Henkel and the basilica has resulted in a structure capable of withstanding immense loads, making it the tallest religious temple in the world. The project exemplifies the fusion of technology and tradition, reflecting Gaudí's vision over a century later.