A scholarly lecture reconstructs a 1303 theft from the royal wardrobe treasury inside Westminster Abbey, describing how the intruder entered and removed goods over two days, the uncertain identity of culprits and the trials that followed. It situates the crime within the physical layout of palace and abbey precincts and explains the administration of the king's wardrobe. The account links the burglary to the fiscal pressures of Edward I's reign, outlines contemporary procedures for royal finance and justice, and draws on administrative records to illuminate both the incident and its broader institutional context.