For members of the Church, the connection between history and religion is essential. From the earliest moments of the Church’s founding, Latter-day Saints have kept a record of their history. The principle behind this practice stems from a scriptural mandate: “There shall be a record kept among you” (D&C 21:1), intended for the “good of the church” and “the rising generations” (D&C 69:8).

http://www.mormonnewsroom.org/article/detailed-research-key-church-historic-sites