"The sixth son of Painter Weidenbach, Karl Augustus, was born in Naumburg an der Saale on the 25th of May 1825. Like his elder brothers, Ernst and Max, he would have received his first drawing training from his father.
It is not known whether he, like his elder brother Ernst, attended the Dresden Academy of Art. However, in 1847 when he was 22 years old , he was described as a painter and was living at home in Naumburg. In 1848 he exhibited at the Berlin Art Academy.
In the early 1850s (before 1853) Karl Augustus emigrated to North America, travelling and painting in Nth California, Yosemite Pk., Virginia, W. Virginia & Maryland. By 1861, when the Civil War started, he had established a reputation as an early German-American artist.
He was married to Frederika (surname unknown) who was born in Germany in 1825 and emigrated to the USA in 1845. After Karl's death Frederika lived with her family in New York City and she died on 3/6/1908 in Manhattan.
Karl and Frederika had two children: Edward who was born in Maryland in 1859 and Laura who was born in Maryland in 1861.
Census records show that in 1864 he was working as a professor and drawing and painting, in Baltimore Maryland and he was still resident there in 1870. In about 1876 he painted a portrait of George Washington based on an earlier portrait by Gilbert Stuart. Karl August died before 1890 and in 1891 his children were living in New York. " - http://weidenbach1790to1860.tripod.com/karl_augustus_weidenbach.html, 27.10.2019
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