• General Notes

  Thierry, Count of Flanders
  From Wikipedia, the free encyclopedia.
  
  Thierry of Alsace (c. 1099 – February 4, 1168), in Flanders known as Dierik van den Elzas, was count of Flanders from 1128 to 1168. He was the youngest son of Duke Thierry II of Lorraine and Gertrude of Flanders (daughter of Robert I of Flanders).
  
  Life
  After the murder of his cousin Charles the Good in 1127, Thierry claimed the county of Flanders as grandson of Robert I, but William Clito became count instead with the support of King Louis VI of France. William's politics and attitude towards the autonomy of Flanders made him unpopular, and by the end of the year Bruges, Gand, Lille, and Saint-Omer recognized Thierry as a rival count. Thierry's supporters came from the Imperial faction of Flanders, and upon his arrival he engaged in battle against William. Louis VI had the Archbishop of Reims excommunicate him, and Louis himself them besieged Lille, but was forced to retire when Henry I of England, William's uncle, transferred his support to Thierry. However, Thierry was defeated at Thielt and Oostcamp and fled to Bruges. He was forced to flee Bruges as well, and went to Alost, where he was soon under siege from William, Godfrey the Bearded, and Louis VI. The city was about to be captured when William was found dead on July 27, 1128, leaving Thierry as the only claimant to the county.
  
  Thierry set up his government in Gand and was recognized by all the Flemish cities as well as King Henry, who had his Flemish lords in England swear fealty to him. Thierry himself swore homage to Louis VI after 1132, in order to gain the French king's support against Baldwin IV, Count of Hainaut, who had advanced his own claim on Flanders.
  
  In 1133 his wife Marguerite de Clermont (widow of Charles the Good; her name has also been recorded as Suanhilde) died, leaving only a daughter. In 1139 then went on pilgrimage to the crusader Kingdom of Jerusalem, and married Sibylla of Anjou, daughter of King Fulk of Jerusalem and widow of William Clito; a very prestigious marriage. This was the first of Thierry's four pilgrimages to the Holy Land. While there he also led a victorious expedition against Caesarea Philippi, and fought alongside his father-in-law in an invasion of Gilead. He soon returned to Flanders to put down a revolt ini the Duchy of Lower Lorraine, ruled at the time by a regency government under Godfrey III, Duke of Brabant. In return Godfrey recognized Thierry's suzerainty over the Duchy of Brabant.
  
  Thierry went on crusade a second time in 1147 during the Second Crusade. He led the crossing of the Meander River in Anatolia and fought at the Battla of Attalya in 1148, and after arriving in the crusader Kingdom he participated in the Council of Acre, where the ill-fated decision to attack Damascus was made. He participated in the Siege of Damascus, led by his wife's half-brother Baldwin III of Jerusalem, and with the support of Baldwin, Louis VII of France, and Conrad III of Germany, he lay claim to Damascus; the native crusader barons preferred one of their own nobles, Guy Brisebarre, lord of Beirut, but in any case the siege was a failure and all parties returned home.
  
  During his absence, Baldwin IV of Hainaut invaded Flanders and pillaged Artois; Sibylla reacted strongly and had Hainaut pillaged in response. The Archbishop of Reims intervened and a treaty was signed. When Thierry returned in 1150, he took vengeance on Baldwin IV at Bouchain, with the aid of Henry I, Count of Namur and Henry, Bishop of Liège. In the subsequent peace negotiations, Thierry gave his daughter Marguerite in marriage to Baldwin IV's son, the future Baldwin V, Count of Hainaut.
  
  In 1156 Thierry had his eldest son married to Elizabeth of Vermandois, daughter and heiress of Raoul I of Vermandois. In 1156 he returned to the Holy Land, this time with his wife accompanying him. He participated in Baldwin III's siege of Shaizar, but the fortress remained in Muslim hands when a dispute arose between Thierry and Raynald of Chatillon over who would possess it should it be captured. He returned to Flanders 1159 without Sibylla, who remained behind to become a nun at the convent of St. Lazarus in Bethany. Their son Philip had ruled the county in their absence, and he remained co-count after Thierry's return.
  
  In 1164 Thierry returned once more to the Holy Land. He accompanied King Amalric I, another half-brother of Sibylla, to Antioch and Tripoli. He returned home in 1166, and adopted a date palm as his seal, with a crown of laurels on the reverse.
  
  He died on February 4, 1168, and was buried in the Abbey of Watten, between Saint-Omer and Gravelines. His rule had been moderate and peaceful; the highly developed administration of the county in later centuries first began during these years. There had also been great economic and agricultural development, and new commercial enterprises were established; Flanders' greatest territorial expansion occurred under Thierry.
  
  Family
  His first wife, Marguerite or Suanhilde, died in 1133, leaving only one daughter, Laurette of Flanders, who married four times:
  
  Iwain, Count of Aalst;
  Henry II, Duke of Limburg;
  Raoul I of Vermandois, Count of Vermandois;
  Henry I, Count of Luxembourg.
  Laurette finally retired to a nunnery, where she died in 1170.
  
  Thierry secondly married Sibylla of Anjou, daughter of Fulk V of Anjou and Ermengarde of Maine, and widow of William Clito. Their children were:
  
  Philip of Flanders (died 1191)
  Matthew of Alsace (died 1173), married Countess Marie of Boulogne
  Margaret I of Flanders (died 1194), married Baldwin V, Count of Hainaut
  Gertrude of Flanders (died 1186), married Humbert III of Savoy
  Matilda, abbess of Fontevrault
  Peter (died 1176), Bishop of Cambrai
  

Details of Thierry's family with Sybille of Anjou

Details of Thierry's family with Swanhilde