| Honorific Prefix: | Saint |
| Theobald | |
| Death Date: | [1] |
| Feast Day: | 8 December |
| Venerated In: | Roman Catholic Church |
| Birth Place: | Marly-la-Ville, Montmorency |
| Titles: | Abbot |
| Attributes: | Knight bearing the arms of Thann; sometimes depicted wearing armor under his Cistercian habit with his miter at his feet |
| Major Shrine: | Vaux-de-Cernay |
Theobald of Marly (French: Saint Thibaut, Thibault, Thiébaut; 1200 – 8 December 1247) was a French abbot and saint. He was born at the castle of Marly, Montmorency, and was trained as a knight. He served as a knight at the court of Philip Augustus, though he later entered the Cistercian monastery of Vaux-de-Cernay in 1220. He was elected prior in 1230 and ninth abbot in 1235. He is commemorated on July 8.
Theobald was the son of crusader Bouchard de Marly, a member of the Montmorency family, and Mathilde de Châteaufort (granddaughter of Louis VI). He was born circa 1200 CE at the Château de Marly. As was the custom at the time for the son of a nobleman, he received a military education but in a Christian environment. During his youth, he showed a spiritual and religious nature.
His family was a benefactor of both the Vaux-de-Cernay and Port Royal monasteries, and close to the court of Philip II of France. Theobald became a knight at the court of Philip.[2]
Around 1220, Theobald discussed entering the religious life with Thomas, the abbot of Vaux-de-Cernay. Thomas advised him to think about his desire for religious life as a Cistercian, as it would be more austere than the life led before. In 1226, he joined the abbey, where he was elected prior in 1230 and ninth abbot in 1235.[3] [4]
During his tenure as abbot he oversaw the repair and expanded the abbey, including the maintenance of existing buildings, and grew the number of monks. Following the Cistercian model of adhering to the Rule of Saint Benedict, he dressed in a simple if not threadbare fashion. He also held an intense devotion to Mary.
As he was an effective administrator, William of Auvergne, the Bishop of Paris asked Theobald to manage the affairs of the Abbey of Port-Royal-des-Champs. In 1236 he began to oversee the, and in 1237 the in Vexin. He also directed the men's Le Breuil-Benoît Abbey near Évreux.
His reputation grew and king Louis IX asked Theobald to pray for the fertility of him and his wife Margaret. Theobald directed them to drink water from the abbey's fountain.[5] In July 1240, the queen gave birth to their first daughter, and ten other siblings. The grateful king and queen endowed the Vaux-de-Cernay abbey.
After a long illness, he died on at Vaux-de-Cernay,[6] and was buried in the chapter house with his predecessors. Placed on his tomb was a simple slab decorated with a crozier and a short Latin inscription: "Hic jacet Theobaldus abbas" (Here lies Abbot Thibauld).[7]
After his death, his tomb became a pilgrimage site. Among the pilgrims were then queen Margaret of Provence with her son Philip. As they could not enter the chapter room to see the tomb of the saint, his remains were transferred in 1270 to the abbey church and placed in a sarcophagus of stone placed on four columns.
He was canonized in 1297. On, his cult was officially recognized and approved by Pope Clement XI.[8]
During the French Revolution, the abbey was destroyed and Theobald's relics were burned, with the exception of his skull which is preserved in the Sainte-Marie Chapel of the .[9]
He is venerated in Thann and Hemel Hempstead.