In most Asian religious traditions, when an image of a deity is made, it must be made sacred (“consecrated”) by inviting the deity to inhabit it. A variety of rituals can be involved in this, including dotting the image’s eyes, visualizing the descent of the deity into the image, writing mantras on the back of a thangka, or placing sacred texts and mantras inside of a statue.
In the Himalayan context, iconography refers to the forms found in religious images, especially the attributes of deities: body color, number of arms and legs, hand gestures, poses, implements, and retinue. Often these attributes are specified in ritual texts (sadhanas), which artists are expected to follow faithfully.
Iconometry means the measurement of icons or religious images. Especially in the Tibetan Buddhist tradition, detailed manuals exist that use precise proportional measurements to standardize the iconography of major deities, and maintain their correct proportions, regardless of scale. These proportions are commonly expressed visually in artist manuals as iconometric grids.
A practice of hiring and commissioning artists to create works of art. In religious context patrons were often rulers, religious leaders, as well as ordinary people. (see also donor)
Historically, Tibetan Buddhism refers to those Buddhist traditions that use Tibetan as a ritual language. It is practiced in Tibet, Mongolia, Bhutan, Ladakh, and among certain groups in Nepal, China, and Russia and has an international following. Buddhism was introduced to Tibet in two waves, first when rulers of the Tibetan Empire (seventh to ninth centuries CE), embraced the Buddhist faith as their state religion, and during the second diffusion (late tenth through thirteenth centuries), when monks and translators brought in Buddhist culture from India, Nepal, and Central Asia. As a result, the entire Buddhist canon was translated into Tibetan, and monasteries grew to become centers of intellectual, cultural, and political power. From the end of the twelfth century, Tibetans were exporting their own Buddhist traditions abroad. Tibetan Buddhism integrates Mahayana teachings with the esoteric practices of Vajrayana, and includes those developed in Tibet, such as Dzogchen, as well as indigenous Tibetan religious practices focused on local gods. Historically major traditions of Tibetan Buddhism are Nyingma, Kagyu, Sakya, and Geluk.