[1] Born Kilian Reinhardt in 1653 or 1654 in Vienna, Kilian was a royal librarian, music copyist, and general musical administrator to the imperial court orchestra of Leopold I, Holy Roman Emperor and Charles VI, Holy Roman Emperor; a position he began in 1683.
[4] In 1727 he wrote the 200 page treatise Rubriche generali per le funzioni ecclesiastiche musicali di tutto l’anno, con un appendice in fine dell’essenziale ad uso, e servizio dell’Augustissima Imperiale Capella; a work which detailed the musical customs of the Wiener Hofburgkapelle.
[5] The composer Johann Joseph Fux described him as a "distinguished virtuoso" on the instrument, and he had a very high reputation in Vienna.
[1] On October 18, 1711, Joseph married the soprano Maria Elisabeth Frühewirthin who was referred to by the moniker "La FrueWirthin".
She performed in the world premieres of multiple operas, including Attilio Ariosti's Amor tra nemici (1708) and La Placidia (1710), Fux's Il mese di marzo conserate a Marte (1709), Pietro Andrea Ziani's Chilonida (1709), and Giovanni Bononcini's Muzio Scevola (1710).
An organist and composer, Karl was trained as a musician by his cousin, Johann Georg Reinhardt, who also served as his guardian.
Only two extent works can definitely be ascribed to him, a Requiem mass and a litany held in the collection of the library at Kremsmünster Abbey.