Historically, the various confessions in Germany have contributed to primary and secondary education and do so still. Education in Germany still embodies the legacy of the Prussian education system introduced by Frederick the Great in 1763. The curricula of the various states of Germany since then have included not only basic technical skills but also music (singing) and religious (Christian) education in close cooperation with the churches. This has led to the churches being assigned a specific status as legal entity of public law, "Körperschaft des öffentlichen Rechts" in Germany, which is a legacy of a 1919 Weimar compromise still in force today.