Kufi square (kufic murabba`) Arabic calligraphy Kalima version. Around 4 sides of the square, the names of the first four caliphs, known as the Rashidun, the `Rightly guided caliphs`.
Reverse script
Arabic (kufic)
Reverse lettering
لا اله الا الله محمد رسول الله
(La Ilah Illa Allah, Muhammad Rasul Allah)
ابو بكر , Abu Bakr
عمر , Omar
عثمان , Uthman
على , Ali (Translation: There is no God but Allah, Muhammad is the Messenger of Allah)