The Royal Collection is one of the most wide-ranging collections of art and artefacts in the world and provides an intriguing insight into the minds of the monarchs who assembled it. During the series, Will Gompertz encounters dozens of these unique objects - some priceless, others no more than souvenirs - each shedding light on our relationship with the monarchy and giving a glimpse into the essential ingredients of a successful sovereign. In this programme, Will investigates the unspoken and unwritten contract that has existed between the rulers and the ruled in this country. Over the centuries, both parties have used compromise and conflict, threat and reward. Will uses six objects from the Collection to illuminate some of the pivotal moments in this relationship. From the Wriotheseley Garter Book, dating from the 1520s, one of the earliest depictions of Parliament in action, to a ring keeping the memory of the recently executed King Charles I alive, Will sees both extremes of the relationship between monarch and subject. He encounters the face of revolution in an early photograph purchased by Prince Albert and meets some of those recently touched by a sword that belonged to King George VI, now known as the Investiture Sword, as he gets to the heart of the might and the majesty of monarchy. Producer: Neil George.