Final answer:
Polonius is the character who died after being stabbed through a curtain by Hamlet in Shakespeare's play.
Step-by-step explanation:
The character who died by getting stabbed through a curtain is Polonius. This unfortunate event occurs in William Shakespeare's play, Hamlet. Polonius is a counselor to King Claudius and the father of Ophelia and Laertes. In Act III, Scene IV, Polonius hides behind a curtain, or an arras, in Gertrude's room to eavesdrop on a conversation between Hamlet and his mother. Mistaking him for Claudius, Hamlet thrusts his sword through the curtain and kills Polonius. This action sets off a chain of tragic events that ultimately leads to the downfall of nearly every main character in the play.