I looked it up, and the concept is called Bagua. Here's a link to the Wikipedia information:
Bagua
I also put some pictures of things on lost the use the same shape/design.
Dharma:

Feng Shui Mirror:

South Korean Flag:

The Trigrams of the Bagua:


The Map of the Island from the Hatch Door:
(click for larger image)

The Ceiling at Brian's House:

Spiral Out was nice enough to explain the meaning of "dharma"
Spiral Out
Dharma is the underlying order in nature and human life and behaviour considered to be in accord with that order. Ethically, it means 'right way of living' or 'proper conduct,' especially in a religious sense. With respect to spirituality, dharma might be considered the Way of the Higher Truths. Dharma is a central concept in religions and philosophies originating in India. These religions and philosophies are called Dharmic religions. The principal ones are Hinduism, Buddhism, Jainism and Sikhism, all of which emphasize Dharma (the correct understanding of Nature) in their teachings.
3nodding
3nodding