The Paul Güell was officially inaugurated in 1888 to coincide symbolically with the Barcelona International Exposition. However the building was not yet ready and two more years were required to complete the works, the decoration and the furnishing. Güell and Gaudí employed some of the most important artists and craftsmen of the day, including architect Camil Oliveras on the dining room and some of the chimneys; painter Aleix Clapés who produced the paintings in the lounge; and decorator Francesc Vidal from whom Güell commissioned most of the furniture.
Although a collective work, Gaudí supervised all ornamentation of the Palau and himself designed many elements in which his signature can be detected. Of particular interest are the wrought iron grilles of the parabolic arches and guard house windows in the entrance, executed by Joan Oñós; the coffering throughout the interior, both decorative and structural, made by Eudald Puntí; and the parabolic chimneys in the bedrooms. Of the furniture, Gaudí designed a chaise longue for Güell's wife, and an original dressing table with a full-blown Modernista aesthetic for his older daughter. Neither of these items of furniture are currently in the Palau Güell.