Fredericksburg br/Gillespie County, Texas br/30 16.178' N 98 52.137' W br/201 S. Washington Streetbr/br/Text: The original portion of this house probably was built between 1848 and 1850 by Willis Wallace, who was granted the land by the German Immigration Company. Of fachwerk construction, the two-room home later was acquired by German farmer Heinrich Mueller, Jr. Mueller's daughter Augusta and son-in-law A. W. Petmecky, who served as justice of the peace for 42 years, built the limestone addition after the birth of their second child in 1895.