Issued in 1989, this Spanish 20 peseta stamp celebrates Antoni Gaudí’s architectural masterpieces—Park Güell, Palau Güell, and Casa Milà. These iconic works in Barcelona embody Gaudí’s unique organic modernist style, blending natural forms with imaginative structure. The stamp honors their designation as UNESCO World Heritage Sites (“Patrimonio Cultural de la Humanidad”) and captures the whimsical, surreal essence of Gaudí’s art through bold typography and textured imagery. A must-have for collectors of architectural and cultural heritage themes.