Inspiration of Ellen G. White

Most Seventh-day Adventists believe church co-founder Ellen G. White (1827–1915) was inspired by God as a prophet, today understood as a manifestation of the New Testament "gift of prophecy," as described in the official beliefs of the church. Her works are officially considered to hold a secondary role to the Bible, but in practice there is wide variation among Adventists as to exactly how much authority should be attributed to her writings.

Source: Wikipedia — Inspiration of Ellen G. White (CC BY-SA 4.0)