Maria de Knuijt, also known as Maria Thins, was a prominent figure in the life of the Dutch painter Johannes Vermeer. She was one of Vermeer's most important patrons and provided support and financial assistance to him throughout his career. Biography Maria de Knuijt was born in 1593 in Delft, Netherlands, and married Reynier Bolnes in 1655. The couple had six children together, although only two survived infancy. Reynier Bolnes was a brewer and a member of the city government, and the couple lived in a large house on the Oude Langendijk canal in Delft. She was the mother-in-law of Vermeer and was instrumental in supporting his artistic endeavors. Vermeer married Maria's daughter, Catharina Bolnes, in 1653, and the couple had several children. Maria's husband died in 1666, leaving her a wealthy widow. She continued to live in the family home with her children. Maria was known for her intelligence, wit, and charm, and she was a respected member of Delft society. After the death of her first husband, Reynier Bolnes, Maria married Johannes Thins in 1675. Thins was a silk merchant and the couple lived together in the family home on the Oude Langendijk canal in Delft. Maria is primarily remembered by her maiden name or her married name from her first husband, Reynier Bolnes, due to her more significant association with Johannes Vermeer as his patron. Despite her reputation as a wealthy and influential member of society, Maria lived a relatively private life. There are few records of her activities or social interactions beyond her role as a patron of the arts, and it is unclear how she spent her time outside of her involvement in cultural and civic institutions. Maria died in Delft in 1680, at the age of 51. She was buried in the Oude Kerk, the same church where Vermeer is also buried. It is said that Vermeer was deeply saddened by her death. Patronage Maria de Knuijt played a significant role as a patron of the arts, particularly in supporting Johannes Vermeer, who is now recognized as one of the greatest Dutch painters of all time. Maria's support for Vermeer was not just financial. She also provided him with a studio space in her home, where he painted some of his most famous works, such as "Girl with a Pearl Earring" and "The Music Lesson." In addition, Maria helped Vermeer establish connections with other