Sequentia is an early music ensemble, founded in 1977 by Benjamin Bagby and Barbara Thornton.
They are interested in the interplay between drama and music, and sometimes do partially staged performances, such as that of Hildegard of Bingen's Ordo Virtutum.
Although the singers involved used the name "Ensemble Vocale Guillaume Dufay", this experimental staging of two church dramas can be regarded as the debut record of Sequentia; the dramatic and angular vocal style and the approach to partly improvised instrumentation already has much in common with their later recordings.
In 2016 the group performed Songs of Consolation, a piece written in the year 523 by the philosopher Boethius during his imprisonment prior to his execution.
It followed restoration work of the 11th century manuscript stolen from Cambridge University that contained the pieces.