Palau de la Musica Catalana has an Open Day on the 27th of November. From 10am to 3pm anybody can have a chance to see inside of one of the best concert halls in Europe, a hall which has received Richard Strauss, Sviatoslav Richter, Duke Ellington, Ella Fitzgerald and many other famous musicians. Visitors will be offered a choir singing work-shop, discounts for tickets and other pleasant surprises. The Palau de la Musica Catalana with its spectacular colorful mosaic ceiling was designed by Lluís Domènech i Montaner. It is a UNESCO site and is rightly considered one of the masterpieces of Catalan art nouveau.