Who was the "holy blissful martyr" whose shrine serves as the destination for Chaucer's pilgrims in The Canterbury Tales? William of Normandy Henry Beauclerc Thomas à Becket Richard the Lion-Hearted

The "holy blissful martyr" is Thomas a Becket.

Thomas a Becket was born in 1119 and became an Archbishop of Canterbury in 1162 until he was murdered in 1170. He is both a saint and a martyr by both Catholic Church and the Anglican Communion.