Rub el Hizb

The Rub el Hizb is an Islamic symbol which can be found on a number of emblems and flags.
In Arabic, Rub means Lord, Sustainer, Provider, Supporter, Nourisher, Sovereign, Ruler, Master or Protector, while Hizb means a Group, Party or Sect.
The symbol is used as a marker for the end of a chapter in Arabic calligraphy.
Initially, it was used in Quran which is divided in 60 Hizb, the symbol determine every quarter of Hizb, while the Hizb is one half of a juz'.