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Constance,1154–98, Holy Roman empress, wife of Holy Roman Emperor Henry VIHenry VI,
1165–97, Holy Roman emperor (1191–97) and German king (1190–97), son and successor of Holy Roman Emperor Frederick I (Frederick Barbarossa). He was crowned German king at Aachen in 1169 and king of Italy at Milan in 1186 after his marriage to
..... Click the link for more information. ; daughter of King Roger II of Sicily. She was named heiress of Sicily by her nephew King William II. On his death, however (1189), the Sicilian nobles, wishing to prevent German rule in Sicily, chose Constance's nephew TancredTancred
(Tancred of Lecce) , b. 1130 or 1134, d. 1194, king of Sicily (1190–94), illegitimate son of Roger of Apulia and grandson of Roger II of Sicily. On the death of his cousin, William II of Sicily, Tancred was crowned (1190) king.
..... Click the link for more information. of Lecce as William's successor. Henry VI conducted an unsuccessful campaign (1191) against Tancred during which Constance was captured but soon released. After Tancred's death (1194) Henry was crowned king of Sicily. When he died (1197) all of Italy revolted against German rule. In order to save the throne of Sicily for her infant son Frederick (later Holy Roman emperor as Frederick IIFrederick II,
1194–1250, Holy Roman emperor (1220–50) and German king (1212–20), king of Sicily (1197–1250), and king of Jerusalem (1229–50), son of Holy Roman Emperor Henry VI and of Constance, heiress of Sicily.
..... Click the link for more information. ), Constance renounced the German kingship for Frederick and had him crowned (1198) king of Sicily. She was regent for her son; before her death she named Pope Innocent III his guardian.
, Fr. Constance, city (1994 pop. 75,980), Baden-Württemberg, SW Germany, on the Rhine River at the western end of Lake Constance (Bodensee), and near the Swiss border.
..... Click the link for more information. , Germany.
in geobotany, one of the quantitative characteristics of the participation of a plant species in the structure of a plant association. It is determined by the number of plots of equal size on which a particular species is found and is expressed as a percentage of the total number of sample plots. Unlike Constance, the consistency of a species (postoianstvo vida) is the frequency with which it is found on the plot of a plant association regardless of its size. The frequency of occurrence of a species (vstrechaemost’ vida) is determined like its Constance but not in the entire association and only within a single phytocoenosis. Sometimes both terms are used as synonyms of constance.