The main floor of the Casa Amatller, at Passeig de Gràcia 41, was decorated by Puig i Cadafalch, charged with transforming the whole of the old building that had been bought by the industrial chocolate producer Antoni Amatller i Costa between 1898 and 1900. The architect and decorator at the same time took care of the lights and the furniture, among which the bench, the light on the ceiling, the clothes hangers, and the pedestals constructed to accommodate the precious collection of crystals of the owner, exploit to the maximum the potential of the decorative arts.
On the furniture the laborious cutting procedures shine out, with motifs in the form of clovers, and the characteristic openwork of the ornamentation, which recreated the Gothic art. The whole building is an example of how far the shapes of Modernisme are fixed in tradition. The exterior shape is also a personal understanding of the Gothic and of the palaces of the Netherlands. In the lobby of the Casa Amatller, furthermore, we find a decoration that reminds us of the Plateresque and Moorish styles, with the lamps and windows.
This unity between the interior and exterior demonstrates one of the strengths of all Modernist decoration: the understanding between decoration and architecture, which created the sensation of a unified setting.