In this report by Sky News we see the Pope at Westminster Abbey, where Kings and Queens are crowned and at Westminster Hall, where the common law courts began, and where both Sir Thomas Moore and King Charles I were tried. Further videos have been embedded at the foot of this column.
In his address to the Parliament and all living former British Prime Ministers, His Holiness said:
I am conscious of the privilege afforded me to speak to the British people and their representatives in Westminster Hall, a building of unique significance in the civil and political history of the people of these islands.
Allow me also to express my esteem for the Parliament which has existed on this site for centuries and which has had such a profound influence on the development of participative government among the nations, especially in the Commonwealth and the English-speaking world at large.
Your common law tradition serves as the basis of legal systems in many parts of the world, and your particular vision of the respective rights and duties of the state and the individual, and of the separation of powers, remains an inspiration to many across the globe.
As I speak to you in this historic setting, I think of the countless men and women down the centuries who have played their part in the momentous events that have taken place within these walls and have shaped the lives of many generations of Britons, and others besides. In particular, I recall the figure of Saint Thomas More, the great English scholar and statesman, who is admired by believers and non-believers alike for the integrity with which he followed his conscience, even at the cost of displeasing the sovereign whose 'good servant' he was, because he chose to serve God first.
The dilemma which faced More in those difficult times, the perennial question of the relationship between what is owed to Caesar and what is owed to God, allows me the opportunity to reflect with you briefly on the proper place of religious belief within the political process.
This country's Parliamentary tradition owes much to the national instinct for moderation, to the desire to achieve a genuine balance between the legitimate claims of government and the rights of those subject to it.
While decisive steps have been taken at several points in your history to place limits on the exercise of power, the nation's political institutions have been able to evolve with a remarkable degree of stability.
In the process, Britain has emerged as a pluralist democracy which places great value on freedom of speech, freedom of political affiliation and respect for the rule of law, with a strong sense of the individual's rights and duties, and of the equality of all citizens before the law.
While couched in different language, Catholic social teaching has much in common with this approach, in its overriding concern to safeguard the unique dignity of every human person, created in the image and likeness of God, and in its emphasis on the duty of civil authority to foster the common good. And yet the fundamental questions at stake in Thomas More's trial continue to present themselves in ever-changing terms as new social conditions emerge.
Each generation, as it seeks to advance the common good, must ask anew: what are the requirements that governments may reasonably impose upon citizens, and how far do they extend? By appeal to what authority can moral dilemmas be resolved? These questions take us directly to the ethical foundations of civil discourse. If the moral principles underpinning the democratic process are themselves determined by nothing more solid than social consensus, then the fragility of the process becomes all too evident – herein lies the real challenge for democracy.
The inadequacy of pragmatic, short-term solutions to complex social and ethical problems has been illustrated all too clearly by the recent global financial crisis. There is widespread agreement that the lack of a solid ethical foundation for economic activity has contributed to the grave difficulties now being experienced by millions of people throughout the world.
Just as "every economic decision has a moral consequence" (Caritas in Veritate, 37), so too in the political field, the ethical dimension of policy has far-reaching consequences that no government can afford to ignore. A positive illustration of this is found in one of the British Parliament's particularly notable achievements – the abolition of the slave trade.
The campaign that led to this landmark legislation was built upon firm ethical principles, rooted in the natural law, and it has made a contribution to civilization of which this nation may be justly proud. The central question at issue, then, is this: where is the ethical foundation for political choices to be found?
[The full text of His holiness' address can be accessed here]