find similar online 20th-century publication, but the text of the Tenebrae services as reformed by Pope Pius X in 1911 is available in the 1924 edition of the Liber Usualis. The 1961 edition, with English rubrics and explanations, is available on more than one site. Music The lessons of the first nocturn at matins are taken on all three days from the Book of Lamentations and are sung to a specific Gregorian reciting tone, which has been called "the saddest melody within the whole range of music". The Lamentations of Jeremiah the Prophet have been set to polyphonic music by many composers, including Palestrina, Tallis and Lassus. Such High-Renaissance polyphonic choral settings of Lamentations at Tenebrae, culminating in those of Lassus (1584), share the same texts with, but in musical idiom are to be distinguished from, the French Baroque genre of Leçons de ténèbres, as composed by Marc-Antoine Charpentier (54 settings, H.91 - H.144), Michel Lambert, and François Couperin. In the 20th century Ernst Krenek wrote a Lamentatio Jeremiae prophetae, Op. 93 (1941-1942), and Igor Stravinsky composed Threni (1957-1958). Each day, the lessons of the second nocturn are from writings of St. Augustine, and the lessons of the third nocturn from two New Testament epistles. These are chanted to the ordinary lesson tone and have been relatively neglected by composers, though there are a few settings by Manuel Cardoso. The Tenebrae responsories have been set by, among others, Lassus, Gesualdo, Victoria, Marc-Antoine Charpentier, Francesco Antonio Vallotti, and Jan Dismas Zelenka. Gregorio Allegri's setting of the Miserere psalm, to be sung at the Tenebrae Lauds, is one of the best known compositions for the service. Also Gesualdo includes a setting of that psalm in his Responsoria et alia ad Officium Hebdomadae Sanctae spectantia, along with a setting of the Benedictus. Roman Rite since 1970 After the 1970 revision of the Roman Breviary, now called the Liturgy of the Hours, a 1988 circular letter from the Congregation for Divine Worship recommended communal celebration of the Office of Readings and Morning Prayer − which were formerly called matins and lauds − on Good Friday and Holy Saturday, and remarked that this office was "formerly called 'Tenebrae'". The General Instruction of the Liturgy of the Hours says: "Before morning Lauds on Good Friday and Holy Saturday, the Office of Readings is, if possible, to be celebrated publicly and with the people taking part."<ref>[https://www.liturgyoffice.org.uk/Resources/Rites/GILH.pdf The