The office of Chamberlain evolved from an intimate personal servant of the monarch into one of the Great Officers of State. Within the English court, the Lord Great Chamberlain holds hereditary authority over the Palace of Westminster, while the Lord Chamberlain of the Household manages the sovereign’s domestic establishment, including the appointment of royal chaplains, physicians, and the supervision of court ceremonies. During the medieval period, the Chamberlain’s proximity to the 'camera'—the private quarters where the treasury was originally kept—granted the office significant fiscal and political influence, often acting as a gatekeeper to the royal person.
In a broader feudal context, many great magnates appointed their own Chamberlains to oversee the administration of their private estates and manorial accounts. In the City of London, the Chamberlain remains a high officer responsible for the city's finances and the admission of freemen. Heraldically and ceremonially, the office is often represented by the symbol of a golden key, worn as a badge of office or depicted behind the shield of arms to denote the authority to grant or deny access to the sovereign's presence.