Shakespeare's play may be seen as a continuation of this tradition. The title page of the Quarto indicates that the play was sometimes known as "The Jew of Venice" in its day, which suggests that it was seen as similar to Marlowe's early 1590s work "The Jew of Malta". One interpretation of the play's structure is that Shakespeare meant to contrast the mercy of the main Christian characters with the Old Testament vengefulness of a Jew, who lacks the religious grace to comprehend mercy. Similarly, it is possible that Shakespeare meant Shylock's forced conversion to Christianity to be a "happy ending" for the character, as, to a Christian audience, it saves his soul and allows him to enter Heaven.