From the Wikipedia page 
Västergötland (Swedish: [²vɛsːtɛrˌjøːtland]), also known as West Gothland or the Latinized version Westrogothia in older literature, is one of the 25 traditional non-administrative provinces of Sweden (landskap in Swedish), situated in the southwest of Sweden.
Västergötland is home to Gothenburg, the second largest city in Sweden, which is situated along a short stretch of the Kattegat strait. The province is bordered by Bohuslän, Dalsland, Värmland, Närke, Östergötland, Småland and Halland, as well as the two largest Swedish lakes Vänern and Vättern. Crown Princess Victoria is Duchess of Västergötland.