"Karmi's plans would preserve the Roman relics, which the public would be able to view from a basement gallery beneath the new building. But the group of archaeologists, which includes several members of Israel's UNESCO committee, says that this solution ignores the possibility of developing a unique historical site." So the issue is not harming relics as the headline misstates, but not putting evidence of the Roman invasion in the spot lite. Let the Vatican return the looted holy items that the Romans stole from Israel and we can discuss this.
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from the article: Western Wall museum plans threaten Roman relics, archaeologists warn