(Aquis-granum or Aqus-gra ai, Germ. Aachen), a large city of Germany, dependent on the archbishopric of Cologne in spiritual matters. As the favorite abode of Charlemagne, it acquired great ecclesiastical importance; and many councils were held there. From the time of Otho I (937) to Ferdinand I, 1558, twenty-nine German emperors were crowned in this city.
The first COUNCIL OF AIX-LA-CHAPELLE was held in 789, on discipline; in the council held in 799 Felix of Urgel renounced Adoptianism. which he previously upheld. The others are that of 803, where the Benedictines received their religious regulations; of 809, on the procession of the Holy Ghost; 813, when the canons of the preceding council were published; 816, confirmatory of the rules of Chrodegang; 817, on St. Benedict's rule, etc.; 825, on the same subjects; 831, declaring the innocence of the Empress Judith; 836, on the restoration of Church property; 837, on Episcopal controversies; 842, by Kings Louis and Charles, on the division of Lothaire's possessions; two sessions in 860, against Queen Thetburga; 862, allowing King Lothaire to contract a new marriage; 992, forbidding marriages during Advent, from Septuagesima to Easter, etc.; 1165, to canonize Charlemagne. — Smith, Tables of Church Hist.