Later this fall, ArtsEmerson is proud to present Triptych (Eyes of One on Another), a celebration and retrospective performance on photographer Robert Mapplethorpe, in partnership with Celebrity Series Boston. This contemporary music piece features an amazing collaboration of artists from nearly every discipline — musicians, poets, theatre artists, and vocalists, all coming together to uplift Mapplethorpe’s seminal works. Be sure to purchase tickets to this enchanting piece of theatre, coming to Boston at the Cutler…