Answer: Becket was killed in Canterbury Cathedral.
Step-by-step explanation:
Thomas’s Becket greatest friend was King Henry II of England. Becket was his Chancellor.
King Henry and Becket stayed great companions until they conflicted over clerical benefit. Henry expressed that the congregation was dependent upon the rule that everyone must follow, yet Becket demanded that the Church was exempt from the rules that everyone else follows.
Becket was slaughtered by henry's knights at the Canterbury Cathedral on December 29th.