Desideratus was a French saint

Saint

A saint is a holy person. In various religions, saints are people who are believed to have exceptional holiness.In Christian usage, "saint" refers to any believer who is "in Christ", and in whom Christ dwells, whether in heaven or in earth...

 in the Christian

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

 church from Soissons

Soissons

Soissons is a commune in the Aisne department in Picardy in northern France, located on the Aisne River, about northeast of Paris. It is one of the most ancient towns of France, and is probably the ancient capital of the Suessiones...

. Unusually, he came from a family of saints, as his father, Auginus, mother, Agia

Agia

Agia, Ayia, Aghia, Hagia may refer to:Greek word:*Agia/Ayia/Aghia/Hagia , the Greek word for "saint" , e.g. Agia Varvara...

, and brother, Deodatus, were all canonized

Canonization

Canonization is the act by which a Christian church declares a deceased person to be a saint, upon which declaration the person is included in the canon, or list, of recognized saints. Originally, individuals were recognized as saints without any formal process...

. The parents taught the two boys to care for the poor and to give away all of their material possessions to aid others.

Desideratus worked as a secretary for King Clotaire and sought to eliminate simony

Simony

Simony is the act of paying for sacraments and consequently for holy offices or for positions in the hierarchy of a church, named after Simon Magus , who appears in the Acts of the Apostles 8:9-24...

 and heresy in Clotaire's lands. According to legend, Desideratus wanted to retire to a monastery but served Clotaire in order to put the needs of others ahead of himself. He was made Bishop of Bourges in 541 and served until his death.

At the fifth Council of Orleans

Fifth Council of Orléans

The Fifth Council of Orléans assembled nine archbishops and forty-one bishops. Sacerdos of Lyon presided over this council.After defending Mark, Bishop of Orléans, from attacks made upon him, it pronounced an anathema against the errors of Nestorius and Eutyches, it prohibited simony, prescribed...

 and second Council of Auvergne he combated Nestorianism

Nestorianism

Nestorianism is a Christological doctrine advanced by Nestorius, Patriarch of Constantinople from 428–431. The doctrine, which was informed by Nestorius's studies under Theodore of Mopsuestia at the School of Antioch, emphasizes the disunion between the human and divine natures of Jesus...

. He died on May 8, 550. May 8th is his feast day in the west.