https://en.wikipedia.org/wiki/Vienna – general information about Vienna.
http://www.wien.info/en – official website of Vienna’s tourist board: information about touristic attractions, the cultural programme in Vienna, shopping, restaurants and lifestyle. You can also book your hotel room in Vienna directly over this website. If you need a personal tour guide in Vienna I would be delighted to offer my services to you.
http://www.booking.com – hotels in Vienna.
www.wienerlinien.at – official website of Vienna’s public transportation.
https://maps.google.com – website to search addresses in Vienna.
http://www.vienna.info/en/weather or http://www.weather.com/weather/tenday/l/Vienna+Austria+AUXX0025 – weather forecast for Vienna.
www.viennaairport.com: official Website of the International Airport of Vienna, flights and various Transport possibilities to the City Center.