Performed by the Danish choir Libera, "Sempiterna" is a hauntingly beautiful choral piece that exemplifies the group's signature style of blending classical arrangements with ethereal vocal textures. Released on the 2008 compilation "Eternal - The Best Of Libera," the track features a slow, meditative tempo that emphasizes the purity and power of the ensemble's harmonies. The composition draws from traditional sacred music traditions, utilizing a simple yet profound melody that allows the choir's intricate layering to create an immersive spiritual atmosphere. As part of Libera's extensive discography, the recording stands as a testament to their ability to evoke deep emotion through minimal instrumentation, making it a staple in collections of contemporary classical and choral music.