The Cask of Amontillado

Think about Poe’s decision to set his story during carnival. What is ironic about the setting? In what ways does the setting suit the plot of the story?
 

The irony lies in the fact that Montesor has chosen a time of celebration and fun to hide the torture and murder of his supposed friend by chaining him to a wall and then bricking him up in it for eternity.  No one can hear Fortunato's (not so fortunate, is he?  More irony for you) screams since he is so far down below all the laughter, music, and sounds of a carnival. 

Also ironic is that the cellar is where wines age in order to improve and refine their taste, but it was used to brick up Fortunato in order for him to die.  A place normally reserved for a good purpose, to make wine wonderfully drinkable and pricey, was used for a murder.  On the other hand, the setting is appropriate for the story because it was a perfect cover for the murder because of the noise and chaos that was occurring around the participants.

it took place in a carnival and a catacomb which is a underground passag. And  the setting is at a catacomb or  a carnival. Montesor put Fortunato in a 4ft deep, 3ft wide, 6ft high.