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The cathedral was a colossal edifice with lancet windows and hood moulds, surrounded by vast tracts of land.
Within the cathedral was a spacious foyer adorned with chandeliers. At the altar was a statue of an angel. In addition, there was a tiered sacrificial chamber where seats encircled the center. Within the center were cages and an altar with a demon-summoning circle inscribed on the floor beneath it.
Cult[]
The cult of demon worship comprised "devout monks and nuns" who wore masks to conceal their identities and engaged in debauchery, and whose principal objective was to summon a demon by offering a worthy sacrifice. They considered the demon their "wicked king" and believed that, on the night of a new moon, the demon's powers would be at their peak.[2]
On the night of a new moon, they defiled Ciel Phantomhive and "Ciel Phantomhive", given that souls "replete with corruption and degradation make the finest offerings for a devil."[3] They continued defiling the twins for an entire month to thoroughly corrupt their souls.[4] Afterward, they carried out the summoning ritual, which they referred to as the "noble mass,"[5] where they recited prayers to the demon[6] and sacrificed "Ciel".[7]
Ciel summoned Sebastian Michaelis[8] and formed a covenant with him.[9] Afterward, at Ciel's behest, Sebastian slaughtered all the cultists, thereby effectively putting an end to the cult itself.[10]
History
The man who purchased Ciel Phantomhive and "Ciel Phantomhive" from slave-traders brought the twins to the cathedral, where the masked cultists had convened for revelry. The gatekeeper asked, "Art thou a monk?", to which the man responded "Fais ce que voudras (Do what thou wilt)," in order to be permitted entry.[11]
That night was a new moon, which, according to the leader of the cult, was when the powers of their "wicked king," a demon, would be at their peak. They defiled the twins, for tainted souls are the ideal sacrifice for a demon.[2]
The cult branded the twins with the mark of the "noble beast," kept them locked in a cage next to other caged children until they were needed, and continued to defile them for a month until the day of the summoning ritual.[4][12]
On the aforementioned day, the cult carried out the summoning ritual, which they referred to as the "noble mass."[5] Within the tiered sacrificial chamber, "Ciel" was taken out of the cage he shared with Ciel to be used as the first offering for the demon. The cult held down "Ciel" at the altar and recited their prayers to the demon.[13] Then, the leader stabbed and killed "Ciel".[7]
Coupled with "Ciel"'s sacrificed soul, which was the fare for a demon to manifest itself into the human world, Ciel's unutterable grief and fervent desire for revenge successfully summoned Sebastian Michaelis.[8][14] Ciel ultimately decided to make a covenant with Sebastian in order to acquire the power to take vengeance upon those who made him and his brother suffer,[9] which Sebastian cemented by carving the mark of the covenant on Ciel's right eye[15] and the corresponding mark on his own left hand.[16] Subsequently, on Ciel's command, Sebastian brutally killed the cultists.[10]
Afterward, Sebastian released Ciel from his cage, Ciel adopted his brother's identity, and Sebastian settled into his current form as a butler.[17] The two of them worked out the details of the covenant, where indefinite and unreasonable conditions were prohibited[18] and which stipulated that, after Ciel's revenge is accomplished, Sebastian will claim his soul as his reward.[19] Ciel's three wishes were "never lie to the contractor," "obey the contractor's commands without question," particularly when Ciel tells him "I command you" and until he exacts his revenge, and "protect the contractor without betrayal until his revenge comes to fruition," particularly from external attacks.[20]
Ciel strove to retrieve the Phantomhive ring from "Ciel"'s abdomen by cutting him open, but failed. Sebastian retrieved the ring on his behalf, and Ciel forbade him from calling him by his name and from standing in front of him, designating him as his "dog."[21]
Ciel apologized to "Ciel"'s corpse and then ordered Sebastian to burn the cathedral and the bodies within it to ash. Ciel refused to take Sebastian's hand and walked off while flames consumed the area.[1] Unbeknownst to them, Undertaker rescued "Ciel"'s corpse from the fire.[22]
