A centre of religious discussions called "Anubhava Mantapa" ("Hall of experience") in Kalyani became the conclave where devotees gathered to discuss their mystic experiences. Here, they expressed their devotion to Shiva in simple poems called "Vachanas". These were spontaneous utterances of rhythmic, epigrammatical and satirical prose emphasising the worthlessness of riches, rituals and book learning. Many of these poems are anonymous, but the authors are identifiable by the unique divine name of the god Shiva that is invoked in the poem.