The Lakshana Devi temple is dated to around 700 CE based on the temple architecture, plan, artwork, style and the inscription found on the brass statue pedestal in its sanctum.
The inscription states:
Om!
Born from the own-house (gotra) of Mosuna and from the Solar race, the great-grandson of the illustrious lord Aditya-varman, the grandson of the illustrious lord Bala-varman, the son of the illustrious lord Divakara-varman,

(1.
2) the illustrious lord Meru-varman, for the increase of his spiritual merit, has caused the holy image of the goddess Laksana to be made by the workman Gugga.

– Laksana Image Inscription, Translated by J. Ph.
Vogel
The inscription mentions Meruvarman and three of his ancestors attested by other texts found in Himachal Pradesh.
The reign of Meruvarman is generally dated to have begun in 680 CE.
This, traced with other epigraphic and textual evidence, has helped date this temple to be either from late 7th-century or the early 8th.
The Lakshana Devi temple is dated to around 700 CE based on the temple architecture, plan, artwork, style and the inscription found on the brass statue pedestal in its sanctum. The inscription states:
Om! Born from the own-house (gotra) of Mosuna and from the Solar race, the great-grandson of the illustrious lord Aditya-varman, the grandson of the illustrious lord Bala-varman, the son of the illustrious lord Divakara-varman,

(1. 2) the illustrious lord Meru-varman, for the increase of his spiritual merit, has caused the holy image of the goddess Laksana to be made by the workman Gugga.
– Laksana Image Inscription, Translated by J. Ph. Vogel
The inscription mentions Meruvarman and three of his ancestors attested by other texts found in Himachal Pradesh. The reign of Meruvarman is generally dated to have begun in 680 CE. This, traced with other epigraphic and textual evidence, has helped date this temple to be either from late 7th-century or the early 8th.
Lakshana Devi Temple, Bharmour