It is suggested that Monteverdi wrote his "Vespro della Beata Vergine" (1610) as a pitch for employment at St. Mark's as successor to Giovanni Gabrieli. In addition to the Magnificat, two movements specify trombones: the opening "Deus in adiutorium" is for six voices, two violins, two cornetts, three trombones, five viole da braccio and basso continuo; Sonata sopra "Sancta Maria, ora pro nobis" is for soprano, two violins, two cornetts, three trombones (one of which can be a viola da braccio) and basso continuo. Monteverdi also leaves the option to use trombones as part of the "sex instrumentis" of the "Dixit Dominus" and in the instrumental "Ritornello a 5" between verses of "Ave maris stella".