Back façade of Gaudí’s Casa Batlló restored

Originally built in the late 19th century, the building was conventional and entirely unremarkable before textile tycoon Josep Batlló engaged Gaudí to remodel it. Between 1904 and 1906, he transformed the drab Victorian into an iridescent, curvilinear structure inspired by nature (coral reefs, marine animals, bones, mushrooms) and Saint George slaying the dragon, with the roof representing the dragon’s curved back and the tiles representing its scales.



The interventions seem to foster a dialogue between the building’s past and present through a particular focus on materiality. Over 85,000 pieces of Nolla mosaic, originally laid at the start of the nineteenth century in the courtyard, have been restored or replicated by hand, using enhanced materials to ensure durability outdoors. The trencadís mosaics, Antoni Gaudí’s signature patchwork of ceramics and glass, were largely preserved in situ where possible, or carefully reproduced using 3D scans and high-resolution archival imagery, keeping their original patterns intact.
Ironwork, including railings and pergola structures, has been restored by Enric Pla Montferrer’s workshop in Alpens. Where previous repairs had introduced welds, the team reinstated Gaudí’s original bolted modular system that was discovered thanks to original construction markings found on site. During the restoration, the team found that even the hidden structure supporting the balconies revealed surprises, such as a spiraling system of brick and reinforced vaults, radical for its time, and undocumented until this recent intervention.
Wooden elements, from the original muntins to balcony doors, were restored or recreated by heritage carpenter Josep Bartolí. Crucially, the original hues — long buried under decades of repainting — were uncovered through stratigraphic analysis, revealing a palette that echoes the green tones of Casa Batlló’s main facade. The stucco too revealed a dramatic shift from a bold black that had faded to a warm cream, reshaping how the entire rear facade is perceived in contrast to the theatrical flourish the building is otherwise celebrated for.
The work of the traditional artisans over the course of the restoration has been documented and recorded to give visitors to the building a glimpse into the complex restoration and Gaudí’s original techniques.
* This article was originally published here
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