Vishvamitra
Gāyatrī is the name of the Vedic meter in which the verse is composed. Its recitation is traditionally preceded by oṃ and the formula bhūr bhuvaḥ svaḥ, known as the mahāvyāhṛti, or "great (mystical) utterance". Vishvamitra is said to have created the Gayatri mantra.
