The file sat on Elias’s desktop like a digital landmine: Sagrada.rar .

: The geometry in the file reveals the cathedral was built to keep something in .

It had arrived in an unsigned email with no body text, sent from a masked relay service. For a freelance archivist like Elias, mystery was usually a billable hour, but this felt different. The Sagrada Família, Gaudí’s unfinished masterpiece in Barcelona, was a cathedral of stone and light, not a compressed archive on a burner laptop.