- Pope Gregory IV
English name=Gregory IV
September 20, 827
January 11, 844
pope( september 20, 827- January 11, 844), was chosen to succeed Valentine in December 827, on which occasion he recognized the supremacy of the Frankish emperor Louis the Piousin the most unequivocal manner.
Papal dependence on the
Holy Roman Emperorloosened through the quarrels of Louis I the Pious and his sons, the future Lothair I, Pepin and Louis the German. On the sons' rebellion against their father, Gregory supported Lothair, hoping his intervention would promote peace, but in practice this action annoyed the Frankish bishops. Gregory's response was to insist upon the primacy of St Peter's successor, the papacy being superior to the Emperor.
The two armies, of Louis and his sons, met at
Rotfeld, near Colmar, in the summer of 833. The sons persuaded Gregory to go to Louis' camp to negotiate, but he then found he had been duped by Lothair. Louis was deserted by his supporters and was forced to surrender unconditionally, and was deposed and humiliated. This sequence of events is known as the Campus Mendaciior "field of lies."Louis was subsequently restored, and after his death Gregory made unsuccessful attempts to mediate in the conflict that ensued between the brothers.
Gregory contributed to the architectural development of Rome (he rebuilt the Basilica di San Marco) and promoted the celebration of the feast of
He is also known for his appointment of
Ausgarfor archbishopof Hamburgand Bremen, and a missionary delegate for north and east parts of Europe. He also fortified the port of Ostia against the attacks of Saracens.
* "Partially from the 9th edition (1880) of an unnamed encyclopedia"
* [http://www.documentacatholicaomnia.eu/01_01_0827-0844-_Gregorius_IV.html Opera Omnia by Migne Patrologia Latina with analytical indexes]
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