The Kremlin is:
The Alhambra is:
Not phrased exactly the same way, but clearly derived from the same source.
And, according to Wikiquote neither of them said it.
"The Law is a fortress on a hill that armies cannot take or floods wash away." The Prophet Muhammed
The Alhambra is:
"Justice is an unassailable fortress, built on the brow of a mountain which cannot be overthrown by the violence of torrents, nor demolished by the force of armies." Joseph Addison
Not phrased exactly the same way, but clearly derived from the same source.
And, according to Wikiquote neither of them said it.