retirement and death In 1653 Froberger passed through Heidelberg, Nuremberg and Regensburg before returning to Vienna in April. He remained with the Viennese court during the next four years, producing at least one more collection of music, the Libro Quarto of 1656 (Libro Terzo is now lost). Froberger was apparently deeply saddened by Emperor Ferdinand III's death on 2 April 1657 and wrote a lamentation dedicated to the memory of the Emperor. His relationship with Ferdinand's successor, Leopold I, was strained for a number of political reasons (numerous forces were opposed to Leopold's election, and among them were the Jesuit order and Johann Philipp von Schönborn, Elector-Archbishop of Mainz; Froberger's mentor and friend Kircher was an important figure in the former, and Froberger had strong ties with the court of the latter. Froberger did, however, dedicate a new volume of his works to Leopold), and on June 30, 1657 Froberger received his last salary as a member of the imperial chapel. Little is known about Froberger's last 10 years. Most of the information comes from the letter exchange between Constantijn Huygens and the dowager Duchess of Montbéliard, Sybilla (1620–1707). Since the death of her husband Léopold-Frédéric of Württemberg-Montbéliard in 1662 the Duchess lived in Héricourt (near Montbéliard, then territory of the house of Württemberg; now département Doubs), and Froberger became her music teacher at around the same time (this indicates that Froberger must have maintained a link with the ducal family of Württemberg since his Stuttgart years). He lived in Château d’Héricourt, the dower house of Duchess Sibylla. The Huygens-Sybilla letters indicate that in 1665 Froberger travelled to Mainz, where he performed at the court of the Elector-Archbishop of Mainz and met Huygens in person for the first time; and at a certain point in 1666 the composer had plans to return to the imperial court in Vienna. As far as is known, though, he never did, and lived in Héricourt until his death on 6 or 7 May 1667. Froberger apparently knew that he was going to die soon, as he made all necessary preparations a day before he died. Works General information Only two compositions by Froberger were published during his lifetime: the Hexachord Fantasia, published by Kircher in 1650 in Rome, and a piece in François Roberday's Fugues et caprices (1660, Paris). In addition to these, a comparatively large number of works are preserved in authenticated manuscripts.