Answer:Pyramus and Thisbe' serves three functions: it adds to the authenticity of the setting, with its ancient Greek and Roman roots; it adds comedy to the play, helping to bring about a happy ending; and it acts as a warning, since the action has such a disastrous ending.
The story of Pyramus and Thisbe also inspired another play that Shakespeare wrote around the same time as A Midsummer Night's Dream, this time a genuine tragedy: Romeo and Juliet . ... Thisbe (i.e., Juliet) soon finds his body and, grief stricken, follows him in death.