DNA research to verify remains of Brabantian Dukes in Leuven
In Leuven, scientists are embarking on an ambitious project to determine whether the crypt of St. Peter's Church truly contains the remains of four medieval Dukes of Brabant.
For centuries, the bones resting beneath the church have been attributed to Godfrey II, Godfrey III, Henry I and Henry II, key figures who shaped the political and territorial foundations of medieval Brabant. However, until now, that identification has rested largely on historical tradition rather than scientific proof.
The remains, which were found to be in poor condition, have been carefully removed from the crypt and professionally conserved. This will allow researchers to carry out detailed DNA analysis to determine their origins, family relationships and biological characteristics. The ultimate goal is to establish whether the bones do, in fact, belong to the four dukes.
Building on earlier research
The project is led by KU Leuven, whose Laboratory for Human Genetic Genealogy has previous experience with high-profile historical identifications. The team earlier analysed the skeleton of William II of Holland (1227–1256), King of the Holy Roman Empire and grandson of Henry I.
"That earlier analysis now offers us the exceptional opportunity to also determine the identity of the four Brabant dukes," says Maarten Larmuseau, professor of genetic genealogy and scientific coordinator of the project.
If successful, the study would provide rare genetic insight into several successive generations of a medieval ruling family, something seldom possible for this period.
Connecting science and heritage
The research is being carried out in partnership with M Leuven and the Leuven pastoral zone on the River Dijle, with support from the city of Leuven and the province of Flemish Brabant. Alongside its scientific dimension, the initiative also aims to bring the region’s medieval history closer to the public.
Digital facial reconstructions are planned to give a visual impression of what the dukes may have looked like. Museum M is also exploring ways to present the findings both inside St. Peter’s Church and in a broader cultural context.
"The Dukes of Brabant are illustrious progenitors from Leuven's past, who helped shape the early history of our city and region," says Leuven alderman for immovable heritage Dirk Vansina. "It is remarkable that this research allows us to once again get closer to them. Thanks to the collaboration between strong Leuven partners, we demonstrate our ambition to better understand and portray our heritage and past. Together, we are reviving a long-gone chapter in a scientific and respectful way."
Results expected within two years
The DNA analysis is expected to take around two years, with researchers hoping to present their conclusions by the end of 2027.
"It is a unique opportunity to gain insight into several successive generations of a medieval elite family. By the end of 2027, we hope to be able to provide more clarity on the identity of the Dukes," concludes Professor Larmuseau.
#FlandersNewsService | © PHOTO KU LEUVEN MARJAN DEBAENE
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