Om,MA,Ni,Pad,ME , Hum is a 6 jewel syllable invocation (mantra) of Avalokiteshwor one who is invoked as savior and protector from danger. One who recities this mantra will be saved from all dangers and will be protected.Thus, this 6 syllables om mane padme hum mean that in dependence on the practice of a path which is an indivisible union of method and union, you can transform your impure body, speech and mind into the pure exalted body, speech and mind of a Buddha. So, this mantra is widely found in every field of Mahayana Buddhism. This mantra can find inscribed on rocks, prayer wheels, chaitya wall, loose stone heaped as mani (jewels) on roads, paths, mountain passes and exit of villages. The mantra "Om Mane Padme Hum" is easy to say yet quiet powerful, because it contains the essence of the entire teaching.
Mandala is a circle which is a device for the Tantric meditation. It is a visual aid for concentration and introversive meditation leading to the attainment of insights and to activation of forces culminating in Siddhi supernatural forces. The Mandala is the graphic representation of this process.
A thangka, also known as tangka, thanka or tanka is a painting on cotton, or silk appliqué, usually depicting a Buddhist deity, scene, or mandala of some sort. Thangka is a Nepalese art form exported to Tibet. The thankga is not a flat creation like an oil painting or acrylic painting but consists of a picture panel which is painted or embroidered over which a textile is mounted and then over which is laid a cover, usually silk. Generally, thangkas last a very long time and retain much of their lustre, but because of their delicate nature, they have to be kept in dry places where moisture won't affect the quality of the silk. It is sometimes called a scroll-painting.
These thangka served as important teaching tools depicting the life of the Buddha, various influential lamas and other deities and bodhisattvas. One subject is The Wheel of Life, which is a visual representation of the Abhidharma teachings (Art of Enlightenment).
Thangka, when created properly, perform several different functions. Images of deities can be used as teaching tools when depicting the life (or lives) of the Buddha, describing historical events concerning important Lamas, or retelling myths associated with other deities. Devotional images act as the centerpiece during a ritual or ceremony and are often used as mediums through which one can offer prayers or make requests. Overall, and perhaps most importantly, religious art is used as a meditation tool to help bring one further down the path to enlightenment.