Casa Vicens is a family residence in Barcelona, designed by Antoni Gaudí and built for industrialist Manuel Vicens. It was Gaudí’s first important work. It was added to the UNESCO World Heritage Site “Works of Antoni Gaudí” in 2005. It was built in the period 1883-1889 and is located at Carrer de les Carolines 24, in the Gràcia district of Barcelona. Thee site was small (smaller today after the widening of the street) compared to similar structures in the area.