Little is known of Dagobert 's early life .
Dagobert is thought to have originally been ordained by Wezilo , Archbishop of Mainz 1084 - 88 , a leading supporter of the emperor in the Investiture Controversy and of the Antipope Clement III .
Little is known of Dagobert 's early life , but he is thought to have originally been ordained by Wezilo , Archbishop of Mainz 1084 - 88 , a leading supporter of the emperor in the Investiture Controversy and of the Antipope Clement III .