Adventism
![](/Images/godic/202412/20/William_Miller2510.jpg")
![The development of branches of Adventism in the 19th century.](/Images/godic/202412/20/Adventism-en.svg2510.png")
![](/Images/godic/202412/20/StJohnsAshfield_StainedGlass_GoodShepherd_Portrait2510.jpg")
![An adventist church in Jyväskylä, Finland.](/Images/godic/202412/20/Jyväskylän_adventtikirkko2510.JPG")
Adventism is a branch of Protestantism with origins in the 19th century American Protestant revival known as the Second Great Awakening.
The name refers to belief in the imminent Second Coming (or "Second Advent") of Jesus Christ. William Miller started the Adventist movement in the 1830s. His followers became known as Millerites.