Forced out of the royal court when Louis the Pious became Emperor in 814, Drogo and Hugh were forcibly tonsured and "put under free custody into monasteries".

Drogo became a cleric in 818 and abbot of Luxeuil in 820.

In 822, as a deeply religious man, Louis performed penance (for causing the death of Bernard of Italy and other issues), at his palace of Attigny near Vouziers in the Ardennes, before Pope Paschal I, and a council of ecclesiastics and nobles of the realm that had been convened for the reconciliation of Louis with his three sons.
Also in attendance were his three younger half-brothers, Drogo, whom he soon installed as Bishop of Metz in 823 (the previous bishop was Gondulphus of Metz, 819 to 822), Hugo, who he soon made Abbot of St-Quentin, and Theodoric.

Drogo became less significant at court and as a court figure by 829 – he had no formal position and did not become a player again until the 830s.

Throughout the 830s Louis the Pious was busy with the rebellions of his sons and assorted counts, dukes, abbots, bishops and archbishops.
This was a period when loyalty and oaths were of paramount importance so it is probable that Drogo’s loyalty to Louis the Pious would have been greatly appreciated.

Louis was re-installed as Emperor at Metz in 835 after his temporary deposition in 833–834.
Drogo wielded much influence in the last years of Louis the Pious’ reign.
 According to the Astronomer, Drogo was Louis the Pious’ daily confessor.
It was Drogo who finally persuaded Louis to forgive his rebellious sons.
Drogo became Archbishop of Metz in 844 and remained in this position for the duration of his life.

Drogo was also the most prominent figure at Louis the Pious’ deathbed.
On his deathbed, Louis asked Drogo to send the royal regalia (crown and sword) to his son Lothar thus indicating the transfer of power.
Drogo took charge of his remains and had them transported from the island in the Rhine where he died.
The Annales Fuldenses record that "Druogonem archicapellum et Adalbertum comitem" (Arch-chaplain Drogo and Count Adalbert) were sent to the east bank of the Rhine in 840 to take the body to Metz where Drogo presided over the funeral rites.
The Sepulchre of Louis the Pious in St. Arnulf in Metz has often been considered as representative of the family tradition.
Arnulf of Metz, mayor of the palace in Austrasia, is supposed to be the progenitor of the Carolingians (Arnulflings).
But in fact, Saint-Arnulf of Metz was primarily a burial place for the women of the Carolingian family.
Before or after Louis the Pious, no Carolingian king was buried there.
One could instead see this sepulchre as a sign of archbishop Drogo's ambition of elevating his city of Metz by making it the cradle of the Carolingian family.
In all probability he wished to establish Saint- Arnoul, whose patron saint was a family ancestor, as the royal mausoleum of the Carolingians (see K.U. Jaschke, Die Karolingergenealogien aus Metz, in list of sources).

In 844, when Sergius was elected Pope Sergius II, Emperor Lothar sent his son Louis to Rome accompanied by Drogo who had recently been raised from bishop to archbishop of Metz.
Sergius appointed Drogo his Vicar apostolic for the Frankish lands of France and Germany.
Drogo also served as Vicar to Pope Leo IV and Benedict III in France.

In October 844, the three sons of Louis the Pious (brothers Lothar, Louis the German and Charles the Bald) met at Thionville to attempt to unite the three portions of the kingdom in peace.
Drogo presided over the assembly and offered his support to Lothar.
His control over the assembly came to nothing as the attempt was referred for future action and eventually Drogo ceased to preside.

Drogo supported Louis the Pious in 839-40 during the Third Civil War between Louis and his sons.
Once Louis died, he supported Lothar then changed sides to support Charles in 841, then changed back to support Lothar.

Drogo remained extremely loyal to his half-brother Louis the Pious and amassed great power under him.
Drogo was also one of the greatest patrons of the arts in the 9th cent
Forced out of the royal court when Louis the Pious became Emperor in 814, Drogo and Hugh were forcibly tonsured and "put under free custody into monasteries".
Drogo became a cleric in 818 and abbot of Luxeuil in 820.
In 822, as a deeply religious man, Louis performed penance (for causing the death of Bernard of Italy and other issues), at his palace of Attigny near Vouziers in the Ardennes, before Pope Paschal I, and a council of ecclesiastics and nobles of the realm that had been convened for the reconciliation of Louis with his three sons. Also in attendance were his three younger half-brothers, Drogo, whom he soon installed as Bishop of Metz in 823 (the previous bishop was Gondulphus of Metz, 819 to 822), Hugo, who he soon made Abbot of St-Quentin, and Theodoric.
Drogo became less significant at court and as a court figure by 829 – he had no formal position and did not become a player again until the 830s.
Throughout the 830s Louis the Pious was busy with the rebellions of his sons and assorted counts, dukes, abbots, bishops and archbishops. This was a period when loyalty and oaths were of paramount importance so it is probable that Drogo’s loyalty to Louis the Pious would have been greatly appreciated.
Louis was re-installed as Emperor at Metz in 835 after his temporary deposition in 833–834. Drogo wielded much influence in the last years of Louis the Pious’ reign.  According to the Astronomer, Drogo was Louis the Pious’ daily confessor. It was Drogo who finally persuaded Louis to forgive his rebellious sons. Drogo became Archbishop of Metz in 844 and remained in this position for the duration of his life.
Drogo was also the most prominent figure at Louis the Pious’ deathbed. On his deathbed, Louis asked Drogo to send the royal regalia (crown and sword) to his son Lothar thus indicating the transfer of power. Drogo took charge of his remains and had them transported from the island in the Rhine where he died. The Annales Fuldenses record that "Druogonem archicapellum et Adalbertum comitem" (Arch-chaplain Drogo and Count Adalbert) were sent to the east bank of the Rhine in 840 to take the body to Metz where Drogo presided over the funeral rites. The Sepulchre of Louis the Pious in St. Arnulf in Metz has often been considered as representative of the family tradition. Arnulf of Metz, mayor of the palace in Austrasia, is supposed to be the progenitor of the Carolingians (Arnulflings). But in fact, Saint-Arnulf of Metz was primarily a burial place for the women of the Carolingian family. Before or after Louis the Pious, no Carolingian king was buried there. One could instead see this sepulchre as a sign of archbishop Drogo's ambition of elevating his city of Metz by making it the cradle of the Carolingian family. In all probability he wished to establish Saint- Arnoul, whose patron saint was a family ancestor, as the royal mausoleum of the Carolingians (see K.U. Jaschke, Die Karolingergenealogien aus Metz, in list of sources).
In 844, when Sergius was elected Pope Sergius II, Emperor Lothar sent his son Louis to Rome accompanied by Drogo who had recently been raised from bishop to archbishop of Metz. Sergius appointed Drogo his Vicar apostolic for the Frankish lands of France and Germany. Drogo also served as Vicar to Pope Leo IV and Benedict III in France.
In October 844, the three sons of Louis the Pious (brothers Lothar, Louis the German and Charles the Bald) met at Thionville to attempt to unite the three portions of the kingdom in peace. Drogo presided over the assembly and offered his support to Lothar. His control over the assembly came to nothing as the attempt was referred for future action and eventually Drogo ceased to preside.
Drogo supported Louis the Pious in 839-40 during the Third Civil War between Louis and his sons. Once Louis died, he supported Lothar then changed sides to support Charles in 841, then changed back to support Lothar.
Drogo remained extremely loyal to his half-brother Louis the Pious and amassed great power under him. Drogo was also one of the greatest patrons of the arts in the 9th cent
Drogo of Metz