Context: The Roman Missal and the Roman Rite Liturgy of the Hours naturally includes references to Mary's immaculate conception in the feast of the Immaculate Conception. An example is the antiphon that begins: "Tota pulchra es, Maria, et macula originalis non est in te" (You are all beautiful, Mary, and the original stain [of sin] is not in you. Your clothing is white as snow, and your face is like the sun. You are all beautiful, Mary, and the original stain [of sin] is not in you. You are the glory of Jerusalem, you are the joy of Israel, you give honour to our people. You are all beautiful, Mary.) On the basis of the original Gregorian chant music, polyphonic settings have been composed by Anton Bruckner, Pablo Casals, Maurice Duruflé, Grzegorz Gerwazy Gorczycki, no:Ola Gjeilo, José Maurício Nunes Garcia, and Nikolaus Schapfl,

Question: What color garment is used in traditional chants to represent the purity of Mary's conception ?
Answer: Your clothing is white as snow,

Question: The rituals for the correct way to enjoy Mass is listed in what text ?
Answer: The Roman Missal

Question: What official writings give specific prayers for each hours of the day for Catholics ?
Answer: Roman Rite Liturgy of the Hours

Question: What type of  melodic, rhythmic, and harmonic changes have been made by composers but are based on the works that are monophonic and  unaccompanied sacred song?
Answer: polyphonic settings have been composed

Question: What include refrences to Jesus's Immaculate Conception?
Answer: Unanswerable

Question: who is purified from original sin by Jesus?
Answer: Unanswerable

Question: What did Anton Bruckner compose base on the Litergy of the Hours?
Answer: Unanswerable