Saint Gertrude of Nivelles Day
Tuesday, March 17, 2026
Saint Gertrude of Nivelles Day, observed on March 17, honors the 7th-century Benedictine abbess who became one of the most beloved saints of the Low Countries. Born in 626 CE into a noble Frankish family in what is now Belgium, Gertrude was the daughter of Pepin of Landen, mayor of the palace of Austrasia. She refused an arranged marriage and devoted her life to religious service, becoming abbess of the double monastery of Nivelles at the age of 20. Saint Gertrude is venerated as the patron saint of cats, gardeners, travelers, and the recently deceased, and is invoked against fever, mental illness, and mouse and rat infestations. Her association with cats stems from the medieval belief that she could protect against rodents, leading to her depiction in art with a mouse or cat at her side. She is also considered the patron saint of hospitals and was known for her hospitality to pilgrims and her care for the poor. Saint Gertrude's Abbey in Nivelles became a major pilgrimage site in medieval Europe, and her feast day remains an important celebration in Belgium.
History
Gertrude was born in 626 in Landen, now part of Belgium, into the powerful Pippinid family. After her father's death when she was about 14, her mother, Itta, sought to arrange a politically advantageous marriage. Gertrude refused, declaring she would have no spouse but Christ. Together with her mother, she established a double monastery in Nivelles, where Gertrude became abbess at age 20. Under her leadership, Nivelles became an important center of learning and spirituality, attracting Irish missionary monks who brought manuscripts and learning. Gertrude was known for her rigorous asceticism, which eventually weakened her health. She resigned as abbess around 656 and spent her final years studying Scripture and preparing for death. She died on March 17, 659, at the age of 33. After her death, numerous miracles were reported at her tomb, and she was canonized by popular acclaim, a common practice at the time. Her cult spread widely throughout the Netherlands, Germany, France, and England during the Middle Ages. The town of Nivelles grew around her abbey, which was destroyed by bombing in 1940 but subsequently rebuilt.
How It's Celebrated
Saint Gertrude's Day is celebrated primarily in Belgium, particularly in the city of Nivelles, where special church services honor the city's patron saint. Traditional processions carry relics of the saint through the streets. Many cat owners give their pets special treats on this day in recognition of Saint Gertrude's role as patron of cats. In some parts of Belgium and the Netherlands, gardeners plant their first spring crops under her protection. Visitors to Nivelles tour the Collegiate Church of Saint Gertrude, a Romanesque church that houses her relics. The day also involves baking traditional spiced cookies and cakes. In rural areas, farmers invoke her blessing for protection against field pests.