Final answer:
The Holy of Holies in the Jerusalem Temple was significant as it housed the Ark of the Covenant and was only accessible to the high priest once a year on Yom Kippur. It was not the main worship space and did not contain sacrificial altars.
Step-by-step explanation:
The Holy of Holies, or debir, in the Jerusalem Temple was significant for several reasons. a. It housed the Ark of the Covenant which was central to the Jewish faith as it represented the divine presence of Yahweh and the original covenant with the Israelites. b. Only the high priest could enter it, and this was only once a year on the Day of Atonement (Yom Kippur), reflecting its extreme sanctity. c. It was not the main worship space, as that area was separate from the Holy of Holies and accessible to the other priests and worshippers. d. It did not contain sacrificial altars; these were located in the courtyard, which was part of the complex but separate from the Holy of Holies. The Holy of Holies was indeed the innermost and most sacred area of the ancient Temple of Jerusalem.