THE NEW SCHAFF-HERZOG
felt himself free to turn to the work which he desired among the heathen Prussians. Here he was killed by a pagan priest before he had succeeded in accomplishing much. His body was brought by the Duke of Poland and buried at Gnesen, whence it was taken to Prague in 1039. (A. Hauck.)
Bibliography: J. Canaparius, Vita Adalberti, in MGH, Script, iv. (1841) 574-620; Bruno, Vita Adalberti, ib. pp. 595-612; Miracula Adelberti, ib. 613-616; Passio Adalberti. ib., xv. part 2 (1888), 705-708 ; De St. Adalberto, ib. pp. 1177-84; MPL, cxxxvii. 859-888 (life and miracles); H. Zeissberg, Die polnische Geschichtsschreibung des Mittelalters, pp. 19 sqq., Leipsic, 1873; H. G. Yoigt, Adalbert von Prag, Berlin, 1898; Hauck, KD, iii. (1906) 1041 sqq.
ADALBOLD, ad'al-bold: Bishop of Utrecht; d. Nov. 27, 1026. He was born probably in the Low Countries, and received his education partly from Notker of Li6ge. He became a canon of Laubach, and apparently was a teacher there. The emperor Henry II., who had a great regard for him, invited him to the court, and nominated him as Bishop of Utrecht (1010), and he must be regarded as the principal • founder of the territorial possessions of the diocese, especially by the acquisition in 1024 and 1026 of the counties of Thrente and Teisterbant. He was obliged to defend his bishopric not only against frequent inroads by the Normans, but also against the aggressions of neighboring nobles. He was unsuccessful in the attempt to vindicate the possession of the district of Merwede (Mircvidu), between the mouths of the Maas and the Waal, against Dietrich III. of Holland. The imperial award required the restitution of this territory to the bishop and the destruction of a castle which Dietrich had built to control the navigation of the Maas ; but the expedition under Godfrey of Brabant which undertook to enforce this decision was defeated; and in the subsequent agreement the disputed land remained in Dietrich's possession. Adalbold was active in promoting the building of churches and monasteries in his diocese. His principal achievement of this kind was the completion within a few years of the great cathedral of St. Martin at Utrecht. He restored the monastery of Thiel, and completed that of Hohorst, begun by his predecessor Ansfried. To the charge of the latter he appointed Poppo of Stablo, and thus introduced the Cluniac reform into the diocese.
Adalbold is also to be mentioned as an author. A life of Henry II., carried down to 1012, has been ascribed to him; but the evidence in favor of attributing to him the extant fragment of such a life (MGH, Script., iv., 1841, 679-695; MPL, cxl. 87- 108) is not decisive. He wrote a mathematical treatise upon squaring the circle (MPL, cxl. 1103- 08), and dedicated it to Pope Sylvester II., who was himself a noted mathematician. There is also extant a philosophical exposition of a passage of Boethius (ed. W Moll in Kerkhistorisch Archie f, iii., Amsterdam, 1S62, pp. 198-213). The discussion Quemadmodum indubitanter musicce consonantice judicari possint (ed. M. Gerbert, in Scriptores ecclesiastici de musica sacra, i., St. Blasien, 1784, pp. 303-312; MPL, cxl. 1109) seems to have been ascribed to him on insufficient grounds
(A. Hauck.)
Bibliography: Van der Aa, Adelbold, bisschap van Utrecht, Utrecht, 1862; Hauck, KD, iii.
ADALDAG, ad'al-dag: Seventh archbishop of Hamburg-Bremen (937-988); d. at Bremen Apr. 28 or 29, 988. He was of noble birth, a relation and pupil of Bishop Adalward of Verden and became canon of Hildesheim. Otho I. made him his chancellor and notary immediately after his accession, and on the death of Archbishop Unni of Hamburg- Bremen (936) nominated him to the vacant see. None of the early incumbents of the see ruled so long a time; and none did so much for the diocese, though his success was partly the fruit of his predecessors' labors and of peculiarly favorable circumstances. Under Adaldag the metropolitan see obtained its first suffragans, by the erection of the bishoprics of Ripen, Sleswick, and Aarhus; and that of Aldenburg was also placed under Hamburg, though the Slavic territories of the present Oldenburg had formerly belonged to the diocese of Verden. He resisted successfully a renewal of the efforts of Cologne to claim jurisdiction over Bremen (see Adalgar). He gained many privileges for his see, in jurisdiction, possession of land, and market rights, by his close relations with the emperors, especially Otho I. He accompanied the latter on his journey to Rome, and remained with him from 961 to 965, and is mentioned as the emperor's chief counselor at the time of his coronation in Rome. Otho placed the deposed pope Benedict V in his custody. After Adaldag's return to Hamburg, he still maintained these relations, and his privileges were confirmed by Otho II. and by the regency of Otho III. The later years of his life were troubled by inroads of the Danes and Slavonians on the north, and he may have witnessed the sack of Hamburg by the latter under Mistiwoi (if its date, as Usinger and Dehio think, was 983). (Carl Bertheau.)
Bibliography: Adam of Bremen, Gesta Hammenburgensis ecclesiw pontificum, in MGH, Script., vii. (1846) 267-389 (issued separately, Hanover, 1846; 2d ed., 1876); W. von Giesebrecht, Geschichte der deutschen Kaiserzeit, i., Brunswick, 1874; R. Kopcke and E. Diimmler, Kaiser Otto der Grosse, Leipsic, 1876; G. Dehio, Geschichte des Erzbistums Hamburg-Bremen, i. 65, 104-132, Berlin, 1877; Hauck, KD, vol. ii.
ADALGAR, ad'al-gar: Third archbishoD of Hamburg-Bremen (888-909); d. May 9, 909. When Rimbert, who was appointed in 865 to succeed Ansgar, the first archbishop of Hamburg, stopped at the abbey of Corvey on his way to his field of labor, the abbot Adalgar gave him his brother, also named Adalgar, as a companion. The younger Adalgar was then a deacon. Toward the end of Rimbert's life he was consecrated bishop to assist the latter; and he succeeded him in the archbishopric (June 11, 888). During the latter half of his twenty years' rule, age and infirmity made it necessary for him also to have a coadjutor in the person of Hoger, another monk of Corvey; and later five neighboring bishops were charged to assist the archbishop in his metropolitan duties.
Adalgar lived in troublous times. Although Arnulf's victory over the Normans (891) was a relief to his diocese, and although under Louis the Child (900-911) it suffered less from Hungarian