Jacob and Theresa were married in Belgium and emigrated to the US in 1857, Theresa the oldest was born in Belgium, the rest of the children were born in Wisconsin. When Theresa died sometime before the 1870 census and sometime after the 1860 census he remarried to a Barbara and they had some more kids. According to the 1900 census Jacob and Barbara were married for 30 years.
The immigration year was found in the 1900 census aswell.