An interest in Medieval music shared by two graduate students at the Schola Cantorum Basiliensis in Switzerland was the foundation for one of the most successful and innovative early music performing ensembles of the twentieth century. Benjamin Bagby and Barbara Thornton met in 1974 and formed the ensemble Sequentia in 1977, naming the group after the sequence, a central poetic and musical form of the High Middle Ages. Sequentia has grown into a touring and recording phenomenon, with over 20 albums to date, films for both television and independent filmmakers, tours to six con...