Agnolo di Domenico del Mazziere or Donnino di Domenico del Mazziere (1466 - 1513)

• Formerly known as the Master of Santo Spirito.
• He was an Italian painter and draughtsman.
• In 1962 the art historian Federico Zeri assembled a group of stylistically similar paintings under the name of the Master of Santo Spirito, referring to the church in Florence where several of the paintings are found.
• Anna Padoa Rizzo later, in 1991, identified the artist as the brothers Agnolo and Donnino (1460-after 1515) di Domenico del Mazziere.
• They together operated a workshop in Florence from the early 1480s until the first two decades of the sixteenth century.
• The basis for this identification is the altarpiece of the Madonna and Child with Two Angels and Saints Lucy and Peter Martyr at the Gallerie dell'Accademia in Venice, which Padoa Rizzo discovered is in fact a documented work by Agnolo and Donnino.
• Since the two brothers shared a workshop they often collaborated, making it difficult to distinguish their individual styles.
• Tax documents suggest that Donnino, the elder brother, was the head of the workshop, while the writings of Giorgio Vasari and Filippo Baldinucci indicate that Agnolo was the most talented and better known of the two.
• Agnolo, along with several other artists, was called to Rome in 1507 to assist Michelangelo with the Sistine Chapel ceiling.
• Michelangelo ultimately sent these artists back to Florence to finish the chapel himself.
• Agnolo and Donnino painted altarpieces and fresco decorations for a number of churches in Florence and its surroundings.
• They also painted portraits, mythological panels and religious works for domestic interiors.
• Agnolo was reportedly a pupil of Cosimo Rosselli.
• Donnino's son, Antonio, was also a painter. 
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