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Gregory IV
pope
Gregory IV (born, Romeādied Jan. 25, 844, Rome) was the pope from 827 to 844.
Cardinal priest of St. Markās Basilica, Rome, he succeeded Valentine as pope and is chiefly remembered for his mediation in the Carolingian dynastic struggle between Lothar I, the co-emperor, and the emperor Louis the Pious, when his father Louis granted part of his kingdom to Lotharās half-brother Charles the Bald. Reacting against this endowment, Lothar, whom Gregory supported, led a revolt and deposed Louis (833). Gregory promulgated the observance of the Feast of All Saints (November 1) and conferred the palliumāi.e., granted the symbol of metropolitan jurisdictionāon the Frankish missionary St. Ansgar, the apostle of Scandinavia.
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