Built by Domènech i Montaner between 1905 and 1908, it is without a doubt the most striking symbol of the Catalan identity in the 1900s and one of the masterpieces of Modernisme. It is one of the largest concert halls in Barcelona. The exterior is spectacular and inside you can admire the impressive inverted cupola, a true ornamental marvel. This curious space is littered with a wealth of unusual details. Visiting is a "must".