Casa Vicens was designed by Antoni Gaudi and built in 1888 as his first major commission. It was built for industrialist Manuel Vicens and features undressed stone, red bricks, and colorful ceramic tiles that pay tribute to Vicens' brick and tile factory. The tiles are decorated with floral patterns inspired by plants that grew on the property, reflecting Gaudi's love of nature which became a major influence in his works. The house was added to the UNESCO World Heritage site of Gaudi's works in 2005.