 Anna Catharina's great-grandson Karl Maximilian von Pfeffel (1811–1890) later married the illegitimate daughter of Prince Paul of Württemberg, Karoline von Rothenburg.The couple are the great-great-grandparents of Boris Johnson, who thereby is a descendant of the lady of the Barfüsser Church in the seventh generation.A team of 40 from the fields of anthropology, genealogy, forensic medicine, molecular biology, history of medicine and toxicology conducted the research underpinning the identification of the dead woman.