Vajrasattva is a Buddhist deity originating in India and primarily functioning universally as a Tantric practice for the purification of sins and defilements. Vajrasattva also has a number of forms used as meditational deities (ishtadevata, yidam).
Vajrasattva the diamond, or adamantine, being is the main deity employed for purification by practitioners of all levels of tantra. Depending on which type of practice is being followed, he can be visualized either alone or with consort.
This is a beautiful unframed painting of Vajrasattva made in Nepal by a very high skilled thangka painter.