Short answers, pulled from the story.
Västergötland had a population of 1,328,128 people on the 31st of December 2016. This total includes one million three hundred five thousand six hundred fifty-nine residents in Västra Götaland County and smaller populations in Jönköping County, Halland County, and Örebro County.
The province was modernized with the establishment of Skaraborg County and Älvsborg County in 1634. These administrative divisions existed from that year until the 31st of December 1997 when most of the area joined the newly created Västra Götaland County.
Dolmens from the Funnelbeaker culture exist in the Falköping area south of lake Vänern. Finnestorp near Larv served as an Iron Age weapons sacrificial site within the same region.
Galtåsen stands as the highest mountain in Västergötland at 362 meters. This peak represents the maximum elevation recorded for the entire province.
King Olof Skötkonung received baptism in Husaby near lake Vänern around the year 1000. He restricted Christian activities to Västergötland due to heavy opposition elsewhere in his kingdom.