Complex sentence: Thereafter, the Raja found the Shiva Linga at the indicated location, which he deified in a temple that he erected in 1526, at the place it was found and called it the "Bhootnath temple" and started the observance of the Shivaratri festival at Mandi.
Split into simpler sentences: Thereafter, the Raja found the Shiva Linga at the indicated location, which he deified in a temple that he erected in 1526, at the place it was found. He called it the "Bhootnath Temple" and started the observance of the Shivaratri festival at Mandi.