F.R.E. 803(20)

Rule 803. Exceptions to the Rule Against Hearsay—Regardless of Whether the Declarant Is Available as a Witness

The following are not excluded by the rule against hearsay, regardless of whether the declarant is available as a witness:

…

(20) Reputation Concerning Boundaries or General History.

A reputation in a community—arising before the controversy— concerning boundaries of land in the community or customs that affect the land, or concerning general historical events important to that community, state, or nation.