My g-grandfather Jacob Bauer's marriage certificate listed his place of birth as "Gallen, Prussia" (married in South Milwaukee, Wisconsin, in 1863). The only Gallen I have found is in Switzerland, but my mother thoght he was definitely from Germany, possibly from Schwarzwald or Schwaben. Only heirloom is a muzzle-loader he brought with him; a gun expert believed it was made in Luxemborg (which may or may not mean anything).