So you're headed to Vienna...
Here is the contact information for Eva-Maria at the Spanish Riding School's Vienna ticket office for tickets to Vienna performances.
Ticket Office / Visitor Centre
Michaelerplatz 1, 1010 Vienna, Austria
Tel.: 011+43-1-533 90 31-0
Fax: 011+43-1-533 90 31-40
Best advice is to go to the main SRS web site and do your homework. There is a calendar there showing the planned performances for 2006. There is also information on booking your own private performance, called a "Privatissimum" in case you want them all to yourself...or have a lot of friends in Vienna. It will be the trip of your lifetime!