At the end of the 19th century, Catalonia, a historical region in northeastern Spain, experienced a powerful cultural upsurge, which is commonly called the “Catalan Renaissance.” This was most clearly manifested in architecture and, above all, in the work of the outstanding representative of European Art Nouveau, Antoni Gaudi (1852-1926). This original master considered himself a Catalan and therefore, even when talking with the king of Spain, he preferred to speak Catalan. Thus, it is more correct to pronounce his name not “Antonio” in Spanish, but “Antoni” in Catalan. Gaudi professed the principles of “natural architecture”: you just need to observe nature and follow its patterns. This “only” was expressed in completely inimitable forms, not subsequently repeated by anyone. Since 1868, Gaudí's life has been connected with Barcelona, whose appearance, like the entire culture of Catalonia, had a strong influence on him. In fanciful buildings he achieved the impression of fantastic, as if hand-sculpted architectural forms. His work is diverse: religious architecture, private and apartment buildings, landscape architecture. The most grandiose creation of Gaudí is certainly the Cathedral of the Holy Family (Sagrada Familia), which has become one of the main attractions of Barcelona. Unfortunately, Gaudi was never able to complete this work: he died in an accident and was buried in the script of the cathedral he had not completed. Gaudi's creations forever defined the appearance of Barcelona, his legacy had a significant influence on postmodern architects.