The thrones or ophanim (Hebrew  אוֹפַנִּים ʿōp̄annīm, „wheels“)

“This was the appearance and structure of the wheels: They sparkled like topaz, and all four looked alike. Each appeared to be made like a wheel intersecting a wheel. As they moved, they would go in any one of the four directions the creatures were faced; the wheels did not change direction as the creatures went. Their rims were high and awesome, and all four rims were full of eyes all around.”— (Ezekiel 1:15-18)

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Ophanim from the „bible accurate angels“ seriessize: 34 x 34 cm