Here's what I have found:
Francis Xavier BARTLEIN (BARTLINE):B: May 1814 in Bavaria, Germany,D: Sept 24 1900 in Wisconsin, USA, Buried at Sacred Heart Cemetery in Shawano, WI.

Wed Jacobina HOUCK around 1850 or so. She was born July 1823 in Bavaria, Germany and died June 6 1913 in Wisconsin.

Their son Peter, born Aug 15 1851 in Wisconsin and died Nov 10 1940 in Shawano, WI. He married Rosa/Rose SCHROEDER born April 27 1856 in Manitowoc,WI and died May 29 1940 in Shawano, WI.

They were married Jan 25 1877 in Manitowoc, WI according to a paper copy of their marriage certificate that I found. I have been unable to find any digital records of their marriage on Ancestry or anywhere else. Dale Bartline, Peter & Rosa's grandson via their son Louis, did a family history about 15-20 years ago and could not find her parents either. I have a copy of what he found but it's very confusingly laid out.
If you want/need anymore information, either check out the two trees I've uploaded or feel free to message me.