Ernests Brastiņš was a Latvian artist, amateur historian, folklorist and archaeologist. He is known as the founder and driving force behind the neopagan religion Dievturība, which he started in the 1920s and which was re-established after the fall of the Soviet Union.

Dievturība is a modern continuation of the ethnic religion of the Latvians from what it was before Christianization in the 13th century. Adherents call themselves Dievturi, literally "Dievs' keepers", "people who live in harmony with Dievs". The movement is mainly based on Latvian folklore, folk songs and Latvian mythology.