Easter week is probably one of the nicest times to visit Vienna (besides spring, summer, autumn and winter). As the New Year's Concert is long gone by now, it is time to dive into Viennas classical spring. There are (amogst many others) two events which you can enjoy these days - Osterklang in the Theater an der Wien from 15th to 25th April, and of course the Vienna Spring Festival, this year for the twentieth time, from 26th March to 17th May in the Musikverein.
Osterklang will host international stars like Magdalena Kožená, Patricia Petibon and Annette Dasch as well as the Vienna Philharmonic Orchestra, who will perform the opening. Further highlights will be Antonín Dvořák's Biblical Songs, Josef Suk's Asrael, Franz Liszt's Legend of Saint Elisabeth and the opening opera Dialogues des Carmélites of Francis Poulenc.
The Vienna Spring Festival will be the home for around 70 concerts with one clear highlight: the newly restored organ. It was the star at the opening concert, and you will have alltogether 8 opportunities to listen to the now fourth organ in the Golden Hall of the Vienna Musikverein.
More information here, on Osterklang and the Vienna Spring Festival