It was on 25 October of 1400 that the author of The Canterbury Tales died, probably from the plague that was circulating at the time, although there's speculation of more nefarious possibilities.
The pilgrimage to Canterbury begins at the Tabard Inn in Southwark -- before it was incorporated into London proper, Southwark was the place to go for illicit entertainment, like prostitution and bearbaiting, but the Inn itself was an outpost for the Abbot at Hyde (outside Winchester) when he or his minions were in London on business, and it became the staging point for pilgrimages.
It was demolished in 1873, but Chaucer was buried in Westminster Abbey - not because of his writing, which hardly anyone knew about while he was alive, but because he had a gov't job as the Clerk of Works.
The Writer's Almanac points out that
"The Canterbury Tales is among the first English literary work to mention the use of paper. Books of Chaucer's day were written by hand on scraped and stretched animal skins and a large Bible could require hundreds of animals to complete, making the distribution of written materials impractical and expensive. For this reason, none of Chaucer's writing was printed in his day, and it is likely that his manuscripts were only circulated among his friends and remained unknown to most people until well after his death."