Wiener Linien are the company running the largest part of the public transit network in the city of Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

, Austria

Austria

Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...

. They are part of the city corporation Wiener Stadtwerke Holding AG.
Until decentralisation on 11 June 1999, Wiener Linien was Wiener Stadtwerke – Verkehrsbetriebe, a directly administered subsidiary of the Vienna city government as they had been for over a hundred years.