Peter Walter was in the first wagon team arriving in Fredericksburg. He started work on this little fachwerk cottage soon after his arrival in 1846, using materials from the immediate neighborhood. A freight hauler, Walter farmed the surrounding land between supply runs to Fort McKavett. St. Barnabas Parish bought the little house in 1952, restoring and consecrating it as a mission in 1954. When President Lyndon Johnson came to Texas to stay at his ranch, he would often worship at this church.