Islamic architects of the 12th and 13th centuries (c.e.) were masters at designing
mathematical patterns used for tileworks, this one shows the name of God,
Muhammad and the four so called patriachal khalifs: Abu Bakr, Omar,
Uthman and the prophet's son in law Ali
The pentangular tiles are in rainbow colors, thus symbolising
the devine revellation of Allah's "message" to mankind
 

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