Roof of the Sagrada Familia, Antoni Gaudí (1852–1926), architect. Barcelona, Catalonia. The columns of the interior are a unique Gaudí design. Besides branching to support their load, their ever-changing surfaces are the result of the intersection of various geometric forms. The simplest example is that of a square base evolving into an octagon as the column rises, then a sixteen-sided form, and eventually to a circle. Although incomplete, the church is a UNESCO World Heritage Site.
Art Nouveau fireplace from 1908 in Catalonia. A small sitting room on the top floor of the Casa Navas is dominated by an Art Nouveau style fireplace, decorated in mosaic tiles by Louis Bru. Reus, Spain. Photo by Mark Luscombe-Whyte.