The ticket price includes 20% Austrian VAT.
VAT-registered companies in the EU should apply for a VAT refund by their own country’s tax authority. Businesses outside the EU can apply for a VAT refund: https://english.bmf.gv.at/taxation/VAT-Assessment-Refund.html
For more information on the EU law please refer to: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CONSLEG:2006L0112:20130101:EN:PDF
Article 53: The place of supply of services in respect of admission to cultural, artistic, sporting, scientific, educational, entertainment or similar events, such as fairs and exhibitions, and of ancillary services related to the admission, supplied to a taxable person, shall be the place where those events actually take place. ▼M3 2006L0112 — EN — 01.01.2013 — 012.001 — 33