The cathare religion is based on dualism like Manicheism (which is the belief in 2 opposite and independent principles : the Good and the Evil or God and Devil).
This point differentiates Catharism from Roman Catholicism.
The logo of the cathare country is constituted of the star - sun or the moon - rising (spreading of the cathare religion) on the country concerned. The underlined symbolizes the ground, the mountains. The black and white represents the cathare dualism. A cutting in the drawing means the important events of the country.