Johann Nicholas Mosel (1839-1904) was granted a 100' x 200' lot in Fredericksburg by the German Emigration Company in 1847. Here he built a rough limestone structure (now the northeast rooms), which might have served later as a Sunday house when he moved to an outlying farm (4 mi. W). German immigrant August William Jordan (d. 1898) bought the house in 1860. His sons sold it as a Sunday house to Henry Duecker (d. 1950), who added the frame additions in 1924. Recorded Texas Historic Landmark - 1986