What A group of art songs connected by a theme or common story is a .?

A group of art songs connected by a theme or common story is called a "song cycle." Song cycles typically consist of multiple songs that are intended to be performed together, creating a cohesive narrative or exploring a specific emotion or concept. Notable examples include Schubert's "Die schöne Müllerin" and Wolf's "Mörike-Lieder." These cycles allow for a deeper exploration of the themes through music and lyrics.