The Hourglass Anthology is a compilation album by the American groove metal band Lamb of God which was released in three different forms. The first disk is "Volume One: The Underground Years", which contains their best songs from when they were called "Burn the Priest", and songs from New American Gospel and As the Palaces Burn. The second disk is "Volume Two: The Epic Years", which contains songs from the albums Ashes of the Wake, Sacrament and Wrath. The third form was a box set with volume 1 and 2 and contains a third volume, "Volume 3: The Vault". This volume contains rare and never before heard songs.