The 31 Planes of Existence by Suvanno Mahathera describes the ancient Buddhist concepts of planes in the context of karma, rebirth, samsara and meditation and realization. The 31 planes, as described in the Suttas, are divided into three types of worlds:
1. Kama-Loka (the sensuous world) – 11 planes
2. Rupa-Loka (the world of form – the material world) – 16 planes
3. Arupa-Loka (the formless, immaterial world) – 4 planes.
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