I think you mean St Thomas a-Becket, who was assassinated in Canterbury Cathedral.
You’re right. Good catch.
The Pope mentioned More in his speech to Parliament..
“.. 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.”
The Pope’s speech in Westminster Hall – full text
http://www.freerepublic.com/focus/f-religion/2591169/posts