In the late 1880s, the Palau Güell was constructed off La Rambla for Gaudí's wealthy patron Eusebi Güell. As one of few major buildings of that era in Ciutat Vella, the neo-Gothic mansion reveals Gaudí's prodigious genius, presenting a characteristic blend of Gothic, Islamic, and art nouveau styles and materials. While this building may appear somewhat somber compared to Gaudí's later works, it offers a fascinating peek into his architectural imagination.