What is referred as the unaccompanied choral music?

Unaccompanied choral music refers to vocal compositions performed by a choir without instrumental accompaniment. This genre highlights the harmonic and melodic capabilities of the human voice, often showcasing intricate polyphony and a rich tapestry of vocal textures. It is commonly found in various musical traditions, including sacred choral works, Folk Music, and contemporary choral compositions. Notable examples include pieces by composers like Giovanni Pierluigi da Palestrina and Eric Whitacre.