Trencadís mosaic is one of the hallmarks of the Catalan Art Nouveau movement and of Gaudi's architecture. Without it, it wouldn't be possible to recognize the famous bench in the Park Güell or the façade of Casa Batlló, for instance. This book takes the reader on a step-by-step journey, going through all of Gaudi's works where he used this technique, explaining the historical and cultural background of the architect; the different techniques of the older brother of trencadís, the classical mosaic and the Arab world; as well as the different materials used by Gaudi to make trencadís and its functionality.