Religion

Religion in Middl-earth is generaly divided into 2 mutualy exclusive factions. The worship of Melkor and the Worship of Illuvatar.

Illuvatarism - The worship of Eru Iluvatar is the religion of the 'good' peoples of Middle-Earth. The specifics of this Monotheistic religion is largly unknown and unspecified by Tolkien, as there is no mention of temples or holy men, it perhaps is a non-organized and personal religion. An alter to Iluvatar was atop Meneltarma in Numenor but was for the most part secluded with no buildings or shines. Any aditional religious sites are never mentioned and it is unkown if they exist or what they look like.

Melkorism - The Worship of Melkor is also not elaborated much by tolkien, but if the worship of Melkor by the Numenoriens are any indication, than Melkorism has apart of its service human sacrifice. The Temple to Melkor in Numenor was described as being domed with a hole in the top to allow smoke from the fire below to exit as wood and human sacrifices are burned. The humans under the domain of the Enemy worship Melkor as God, denying the existance of Eru Illuvatar, Sauron told the Numenoriens that Illuvatar is a lie told by the Valar to keep the numenoriens from power. Sauron, since the downfall of Melkor has had himself worshiped as a god by his subjects, it is unkown if other dark entities such as the witchking are also worshiped as deitys in Melkorism.