Modal correspondence theory on quantales Alessandra Palmigiano In [1], the Kripke semantics of basic modal logic has been generalized via an embedding of Kripke structures into the larger class of pointed stably supported quantales. Independently of this embedding, completeness w.r.t. this quantale-based semantics has been proved for a number of logical systems which include K, T, K4, S4 and S5. Building on the observation that a Sahlqvist correspondence argument underlies each of these completeness results, we develop a three-sided Sahlqvist-style correspondence theory, involving a positive modal logic language, its associated first-order correspondence language and fragments of the language of stably supported quantales; we will also discuss open problems and further directions of research. [1] S. Marcelino, P. Resende, An algebraic generalization of Kripke structures, Mathematical Proceedings of the Cambridge Philosophical Society (2008), 145 : 549-577.