The white bricks spell the word “Allah” or “God” (الله) in square Kufic Arabic.
The white bricks spell the word “Muhammad” (محمد) in square Kufic Arabic.
The black bricks spell the words “There is no god but God” (لا إله إلا الله) in square Kufic Arabic. This is the first part of the Islamic Shahada or profession of faith.