Independent caterer Graysons has scooped a £4m catering and hospitality contract at the National Archives (TNA) in Kew.
The five-year deal will see the caterer manage all public facing cafes, on-site restaurant and staff dining when the contract begins this month.
Graysons will also deliver hospitality and event services, while working with TNA to create an external event market for the venue.
Simona Oproiu, business development director for Graysons, commented: "The National Archives is a superb cultural destination which makes for a perfect fit into our portfolio of visitor attractions across London.
"We are really excited to reinvigorate all things food and drink at TNA, making it a proud staple of local residents, researchers and tourists alike. We will be introducing seasonal food at its best which celebrates all the wonderful produce that Richmond borough has to offer."
Mark Newman, TNA head of estates and facilities, added: "The investment, design plans and menus Graysons has put forward will contribute to the excellent visitor experience here at The National Archives.
"Throughout the whole tender process, Graysons has shown a huge passion for our heritage and we look forward to a close and exciting partnership."