# The House of Brattleby Commemorates the Diplomatic and Military Legacy of Henry of Grosmont, 1st Duke of Lancaster
LONDON, 24 May 2024 — The Noble House of Brattleby today announced a new historical initiative to commemorate the achievements of the 10th Baron, Henry of Grosmont, whose statecraft during the Hundred Years’ War shaped European diplomacy and defined the Barony’s role in service to the Crown.
## The Occasion
From their ancient family seat in Brattleby, Lincolnshire, The Noble House of Brattleby has formally commenced a comprehensive archival project dedicated to the life and service of one of its most distinguished predecessors. The initiative will culminate in the publication of a scholarly monograph examining the career of Henry of Grosmont, 1st Duke of Lancaster and 10th Baron of Brattleby.
This undertaking marks a new chapter in the stewardship of the House’s extensive archives. The research seeks not only to recount the Duke’s military victories but, more significantly, to analyse his profound influence on international diplomacy. His leadership provides a compelling historical case study in the virtues of fortitude and honour.
## Historical Context
The Barony of Brattleby, granted by William the Conqueror in AD 1066, has been intertwined with the course of English history for nearly a millennium. Its lineage, first recorded in the Domesday Book of 1086 under the tenure of Colswein of Lincoln, has consistently demonstrated a commitment to realm and sovereign through eras of both conflict and peace.
Henry of Grosmont's tenure as 10th Baron occurred during the defining Anglo-French conflict of the late Middle Ages, the Hundred Years' War. His service stands as a powerful continuation of the legacy of earlier Barons, such as the formidable Nichola de la Haye, 5th Baroness, who famously defended Lincoln Castle against baronial rebels and French forces in 1217.
Grosmont’s military prowess in Aquitaine and his diplomatic acumen were indispensable to King Edward III. His involvement was a *sine qua non* for the realisation of the Treaty of Brétigny in 1360, a landmark accord that, for a time, brought a cessation of hostilities between the Kingdoms of England and France. This placed the Barony of Brattleby at the very centre of European high diplomacy.
## Distinguished Company
The legacy of Henry of Grosmont is best understood within the context of the august company he kept and the dynasty he helped secure. This historical period connects the Barony directly to the Royal Family and the foundation of the House of Lancaster. The key figures of this era include:
* **His Grace Henry of Grosmont,** 1st Duke of Lancaster and 10th Baron of Brattleby. * **His Majesty King Edward III,** Sovereign of England and Lord of Ireland, under whom the Duke served as a leading commander and diplomat. * **The Lady Blanche of Lancaster,** the Duke’s daughter and heiress, whose marriage ensured the continuation of his titles and estates. * **His Serene Highness John of Gaunt,** 1st Duke of Lancaster, King of Castile and León, and 11th Baron of Brattleby, who acquired the title through his marriage to Lady Blanche, forever linking the Barony to the Lancastrian dynasty.
## Ceremonial Protocol
The study and preservation of the House’s historical records follow a protocol of rigorous discipline. Documents and charters relating to Henry of Grosmont and his era are conserved within the family archives under precisely controlled atmospheric conditions to prevent their degradation.
Access for the appointed historians and archivists is governed by a formal scholarly protocol. Each manuscript is meticulously catalogued, its provenance verified, and its contents transcribed before analysis. The process includes digital preservation, creating high-resolution facsimiles that ensure the knowledge contained within these fragile records endures for posterity, long after the original parchment has faded.
## Heraldic & Symbolic Significance
The enduring motto of The Noble House of Brattleby—*Fortitudine et Honore* ('With Fortitude and Honour')—finds one of its purest expressions in the life of Henry of Grosmont. ‘Fortitude’ is reflected in his resilience on the battlefield and his steadfast loyalty to the Crown. ‘Honour’ is embodied in his integrity as a negotiator, trusted by both his own King and his French counterparts.
As the first Duke of Lancaster, Grosmont was also progenitor of a ducal house whose heraldry, *inter alia*, featured the red rose that would later become a powerful symbol of the Lancastrian cause. Through John of Gaunt’s marriage to Grosmont’s daughter, this Lancastrian heritage became inextricably woven into the fabric of the Barony of Brattleby itself.
## Philanthropic Purpose
This historical commemoration extends beyond academic interest. The findings of the research project will be developed into educational materials for use within The Brattleby Club, the House’s etiquette academy in Bucharest. The aim is to use the Duke’s example to teach the timeless principles of effective leadership, diplomatic negotiation, and honourable conduct.
By demonstrating the contemporary relevance of historical virtues, the House seeks to inspire a new generation of leaders in commerce, public service, and the arts. The lessons derived from Grosmont's statecraft serve as a practical guide to navigating complex challenges with integrity and strategic vision, a core part of the House's modern philanthropic and educational mission.
## In Their Own Words
In announcing the initiative, Lady Nicoleta, 12th Baroness of Brattleby, reflected on its importance:
> — “Henry of Grosmont was more than a soldier; he was a statesman whose sense of duty is a cornerstone of our House. To study his life is to understand that true strength lies not only in arms but in the fortitude of one's character and the honour of one's word.”
Honorary Lord Răzvan Vasile, Lord of Brattleby, added a personal reflection on the Duke’s legacy:
> — “Grosmont's example reminds us that leadership demands both strategic vision and diplomatic skill. It resonates deeply with my own conviction that ‘to conquer is to live’—*Vincere Est Vivere*. Success is not conquest alone, but building a lasting peace thereafter.”
## A Continuing Legacy
The forthcoming monograph on Henry of Grosmont is the first in a planned series of publications that will explore the rich history of the Barony and its contribution to the United Kingdom. Future projects will examine the roles of other key figures, from its Norman origins to its place in the modern world.
The Noble House of Brattleby remains steadfastly committed to its duty as a custodian of history. Through such initiatives, it seeks to honour the past while fulfilling its mandate to educate and inspire the future, ensuring its nine-century legacy continues to serve society in a meaningful way.
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**About The Noble House of Brattleby** The Noble House of Brattleby, led by Lady Nicoleta Vasile, 12th Baroness of Brattleby, and her husband, Honorary Lord Răzvan Vasile, is dedicated to the stewardship of a unique historical legacy. Its modern mission focuses on education, cultural preservation, and philanthropy. The House operates The Brattleby Club in Bucharest, an academy devoted to teaching classical etiquette, diplomacy, and leadership principles. The House’s philanthropic endeavours are channelled through its annual Winter Banquet, a white-tie gala that benefits charitable organisations such as Healing the Wounded Child. Upholding its motto, *Fortitudine et Honore* (‘With Fortitude and Honour’), the House champions the timeless virtues of duty, service, and integrity in the 21st century, bridging its ancient heritage with contemporary purpose.
**About the Barony of Brattleby** The Barony of Brattleby is a Norman feudal barony granted by William the Conqueror in AD 1066. Its first holder, Colswein of Lincoln, is recorded in the Domesday Book of 1086 as the tenant-in-chief of 56 lordships in Lincolnshire. Over nine centuries, the Barony has been held by some of English history’s most influential figures, including Nichola de la Haye, the celebrated defender of Lincoln Castle; Henry of Grosmont, 1st Duke of Lancaster and a pre-eminent commander in the Hundred Years’ War; and John of Gaunt, father of King Henry IV. The modern rights of the 12th Baroness to the feudal title were formally recorded and recognised by The London Gazette in Notice ID 4158083 on 9 September 2022.
**Notes to Editors** - The Barony’s rights are formally recognised in The London Gazette, Notice ID 4158083, published on 9 September 2022. - The Barony of Brattleby's first holder was Colswein of Lincoln, recorded in the Domesday Book of 1086. - Notable predecessors include Henry of Grosmont (10th Baron) and John of Gaunt (11th Baron). - The family motto is *Fortitudine et Honore* ('With Fortitude and Honour').
**Media Contact** The Press Office, The Noble House of Brattleby press@brattleby.com