Tripiṭaka. Sūtrapiṭaka. Amitāyurdhyānasūtra

The Amitāyus Contemplation Sūtra (simplified Chinese: 佛说观无量寿佛经; traditional Chinese: 佛說觀無量壽佛經; pinyin: Fóshuōguānwúliàngshòufójīng, English: Contemplation of Amitāyus Sutra, or Sutra on the Visualization of Measureless Life [Buddha], Taisho no. 365) is a Mahāyāna sutra which is important for East Asian Pure Land Buddhism, a major branch of East Asian Mahāyāna. No Sanskrit original has been found, and the title of the sutra has been back-translated into Sanskrit by scholars as either Amitāyur-dhyāna Sūtra or Amitāyur-buddhānusmṛti-sūtra ("Amitāyus Buddha-mindfulness Sūtra"). The Contemplation Sūtra is part of a genre of Contemplation Sutras (Chinese: 觀經, Guān jīng) that include other similar texts with visual meditations like Samantabhadra Meditation Sutra. Also called by the short title Contemplation Sutra (觀經, Guān jīng), this sutra is one of the three principle Pure Land sutras along with the Amitayus Sutra and the Amitabha Sutra. Amitāyus ("Measureless Life") is another name for the Buddha Amitābha, the preeminent figure in Pure Land Buddhism, and this sūtra focuses mainly on meditations involving visualizations of Amitabha and his pure land of Sukhavati (The Blissful). This is reflected in the name of the sūtra, which can be translated as "Amitāyus Contemplation Sūtra" or "Amitāyus Visualization Sutra" It is believed to have first been composed in Chinese in the 5th century.