The top things to do in Vienna are guaranteed to fill up an itinerary for more than a week.  The capital of Austria and the largest city as well is the cultural, economic and political centre of the republic.  Vienna was once home of the Hapsburg court and other empires, hence the large number of historical landmarks in the city.  In addition, the city centre is also declared a UNESCO World Heritage Site. But if time is of the essence and spending more than a week in Vienna is not an option,