Indulge yourself with imperial splendor and Viennese grandeur. Over a glass of wine and delicacies, Vienna’s bustling markets, theatres, palaces, opera houses, etc… make Vienna a city to be RE-Discovered again and again. What is happening in Vienna & Events: 650 years of the Austrian National Library: Treasury of Knowledge 26 January 2018 - 13 January 2019. Each year more than 450 balls take place in Vienna. The city of waltzes exuberantly celebrates Carnival in January and February.