In 1815 , she was engaged .
On 25 July 1819 in Karlsruhe , Sophie married her half - grand - uncle Prince Leopold of Baden , the son of a morganatic marriage .
In 1815 , she was engaged , and on 25 July 1819 in Karlsruhe , Sophie married her half - grand - uncle Prince Leopold of Baden , the son of a morganatic marriage .