An altar is a structure that was presumably used for ritual offerings, burned or otherwise. Thus it is possible that such structures as
khirigsuur and mounds served on occasion as altars. Small circles and Turkic enclosures were certainly used for ritual offerings. Other structures that were probably used for offerings include a type associated with dwellings and another associated with Early Nomadic burials. An ovoo (oboo) is an altar found ubiquitously on ridges, passes, and at difficult crossings. While visible in its modern form, it may well mark a site that was honored, also, in the ancient past.

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