An early-13th-century Islamic watchtower built of rammed earth, Bofilla Tower had lost its roof and its wooden interior structure. The restoration aimed to mitigate its degradation and make selective repairs, while retaining its patina and avoiding confusion between original and replacement elements. The facades were cleaned manually with a brush. Damaged sections were filled with a lime-and-earth mixture, the surface recessed from the wall plane but matching its colour and texture. The three floors and parapet walk within were rebuilt in a contemporary style. The castellated northeast corner was reconstructed. The project involved many professionals and academics and has become an international reference for the restoration of rammed-earth architecture.