interior - squares with kufic writing

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On the undersides of the arcs above the niches there' a stroke with largeer and smaller squares. On the large squares you can read the name of Muhammad in the middle and fout times the text al hamdu lilahi (God be praised). On the small squares you can read four times the name of Muhammad. So in kufic writing one can write the name of Mohammed as well inside of an elongated frame as one, two or four times inside a square.
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