Trikaya in the context of Samboghakaya

The dharmakāya (Sanskrit: धर्म काय, "truth body" or "reality body", Chinese: 法身; pinyin: fǎshēn, Tibetan: ཆོས་སྐུ་, Wylie: chos sku) is one of the three bodies (trikāya) of a Buddha in Mahāyāna Buddhism. The dharmakāya constitutes the unmanifested, "inconceivable" (acintya) aspect of a Buddha out of which Buddhas arise and to which they return after their dissolution. When a Buddha manifests out of the dharmakāya in a physical body of flesh and blood, which is perceptible to ordinary sentient beings, this is called a nirmāṇakāya, "transformation body".

The Dhammakāya tradition of Thailand and the Tathāgatagarbha sūtras of the ancient Indian tradition view the dharmakāya as the ātman (true self) of the Buddha present within all beings.

Samantabhadri (Sanskrit; Devanagari: समन्तभद्री ; IAST: samantabhadrī, Tibetan: ཀུན་ཏུ་བཟང་མོ, Wylie: kun tu bzang mo) is a dakini and female Buddha from the Vajrayana Buddhist tradition. She is the consort and female counterpart of Samantabhadra, known amongst some Tibetan Buddhists as the Primordial Buddha. Samantabhadri herself is known as the primordial Mother Buddha. Samantabhadri is the dharmakaya dakini aspect of the Trikaya, or three bodies of a Buddha. As such, Samantabhadri represents the aspect of Buddhahood in whom delusion and conceptual thought have never arisen. As font or wellspring of the aspects of the divine feminine she may be understood as the Great Mother or as an aspect of Prajnaparamita.

Samantabhadri is a figure found primarily in the Nyingma or Old Translation school of Tibetan Buddhism. A figure that is nearly equivalent to Samantabhadri in the New Translation or Sarma schools is Vajradhatu-ishvari; she is dark blue and her consort is Vajradhara.

The Ratnagotravibhāga (Sanskrit, abbreviated as RGV, meaning: Analysis of the Jeweled Lineage, Investigating the Jewel Disposition) and its vyākhyā commentary (abbreviated RGVV to refer to the RGV verses along with the embedded commentary), is an influential Mahāyāna Buddhist treatise on buddha-nature (a.k.a. tathāgatagarbha). The text is also known as the Mahāyānottaratantraśāstra (The Ultimate Teaching of the Mahāyāna). The RGVV was originally composed in Sanskrit, likely between the middle of the third century and no later than 433 CE. The text and its commentary are also preserved in Tibetan and Chinese translations.

The Ratnagotra focuses on the buddha nature present in all sentient beings, which is eternal, blissful, unconditioned and originally pure. This buddha nature is obscured by defilements, but when they are removed, the buddha nature is termed dharmakaya, the ultimate Buddha body. The buddha nature is what is referred to as the "jewel disposition" or "jeweled lineage" (ratnagotra) of the Buddhas. The RGVV often quotes from various tathāgatagarbha sutras and comments on them. The Ratnagotravibhāga is an important and influential text in Tibetan Buddhism and was also important for the Huayan school.

The many different varieties of Buddhist art often show buddhas and bodhisattvas, as well as depictions of the historical Buddha, known as Gautama Buddha (or Siddhārtha Gautama, Śākyamuni, or Tathāgata).

Especially in Mahayana Buddhism, the main image in a temple or shrine often does not represent the historical Buddha, although the situation is complicated by Buddhist teachings such as trikaya beliefs by which buddhas, including the historical buddha, have different manifestations.