Who painted "The kiss?"

In 1907 Gustav Klimt began work on The Kiss, the most famous work of his entire oeuvre, as well as the culmination of the European Jugendstil movement. The theme of a pair of lovers, united through a kiss, was one that occupied Klimt throughout his career. There have been numerous attempts to identify the woman portrayed in The Kiss. Those mentioned have included Klimt's life-long partner Emilie Flöge, but also Adele Bloch-Bauer. The subject's well-proportioned facial features reveal a similarity to many of the women that Klimt portrayed, but ultimately they cannot be unequivocally attributed to a particular person.