I believe the Ark of the Covenant is in a location where it was placed by some of the Levites under the leadership of Josiah. 2 Chronicles 35:3 says that King Josiah told the Levites to take the Ark and put it in the “house.” In Hebrew, the word “bayit (בַּיִת)” translates in many locations as “house.” It also has an alternate translation which is a “secret, secluded hiding place” which the text says King Solomon built for the purpose of hiding the Ark of the Covenant. Josiah was aware of what was going on. The Babylonians were getting ready to defeat the Assyrians, the Egyptians had already been defeated, the ten tribes in the north of Israel had been taken into captivity by the Assyrians, and so Josiah told the Levites to put the Ark underneath what is today the Dome of the Rock where the Holy of Holies was.
Where Is the Ark of the Covenant?
