Hinduism:
The Om or Aum is one of the most important religious symbols to Hindus. The syllable Om is composed of the three sounds a-u-m, which represent a triad: the three worlds of earth, atmosphere, and heaven.

Islam:
The star and crescent is the best-known symbol used to represent Islam.

Sikhism:
The Khanda, which is a double edged sword, represents the belief in one God. The chakkar, like the kara it is a circle representing god without beginning or end and reminding Sikhs to remain within the rule of God. Two crossed kirpans representing spiritual authority and political power.

Jainism:
The religious Ahisma hand symbol with a wheel on the palm symbolizes the Jain vow of Ahimsa, meaning non-violence. The wheel represents the dharmacakra, to halt the cycle of reincarnation through the pursuit of truth.

Buddhism:
The Wheel of Dharma symbolizes the Buddha's turning the Wheel of Truth or Law. The eight spokes of the wheel symbolize the Noble Eightfold Path. The wheel also represents the endless cycle of samsara, or rebirth, which can only be escaped by means of the Buddha's teachings.

Christianity:
The cross symbol represents and memorializes Christ's death.

Bahai:
The nine-pointed star is generally used by Bahai’s as a symbol of their faith. Since the Bahai faith claims to be the fulfillment of the expectations of all prior religions, this symbol, reflects that sense of fulfillment and completeness.

Taoist:
The Yin and Yang symbol, a circle divided into two swirling sections, one black and the other white represents perfect harmonic balance.

Judaism:
The six-pointed Star of David is religious symbol of the Jewish faith. The sign is based on the shape of David’s shield or the symbol on his shield.

Shinto:
The Torii gate religious symbol, mark the entrance to sacred space. It represents the transition between the finite world and the infinite world of the gods.

Zoroastrianism:
The symbol represents The Sacred Fire as the provider of heat and light and the source of life and growth.

Atheism:
International symbol of free thought.