Bastiano di Bartolo Mainardi (1466 – 1513) was an Italian painter of the Early Renaissance. He was born in San Gimignano and was active there and in Florence. According to Giorgio Vasari, Mainardi is portrayed in the frescoes in the Sassetti and Tornabuoni Chapels by Domenico Ghirlandaio, Mainardi's brother-in-law and master. Vasari also claimed that Mainardi took part in Ghirlandaio's frescoes (1476) in the Abbey of Passignano in Val di Pesa, near Florence, and in the chapel of Saint Fina in the Collegiata of San Gimginano (1485). The Annunciation fresco in the loggia of San Gimignano's Collegiata, dated 1482, is often also attributed to Mainardi. Mainardi's authorship of these works was, however, proven impossible when Italian art historian Lisa Venturini discovered Mainardi's birthdate as 1466 (it was previously placed around 1460 or earlier). Thus, Mainardi was too young to have assisted Ghirlandaio in these works or to have painted the Annunciation San Gimignano (which is now regarded as a work by Domenico Ghirlandaio's brother, Davide). Further, Mainardi could probably not have painted most of the Ghirlandaio workshop paintings once attributed to him, like the famous tondo of the Madonna and Child with the Infant Saint John the Baptist and Three Angels at the Louvre. Mainardi's secure works are nevertheless strongly indebted to Ghirlandaio's, and the artist had a lifelong affiliation with the Ghirlandaio family workshop. One of his latest works, an altarpiece of the Madonna and Child with Saints, commissioned in 1511 for the church of Sant'Agostino in San Gimignano (where it remains today), was completed after his death in 1513 by Domenico Ghirlandaio's son, Ridolfo. Paintings by Bastiano Mainardi Art historians recognize the following paintings as certainly by Mainardi and among his most important works: Saint Gimignano Blessing Three Men above a Memorial to Domenico Strambi, dated 1488, fresco (San Gimignano, Sant'Agostino). Saint Jerome; Madonna and Child, both dated 1490, frescoes (Florence, Museo Nazionale del Bargello). Madonna della Cintola, circa 1492–95, fresco (Florence, Santa Croce, Baroncelli chapel). Frescoes, including Saints Gimignano, Lucy, Augustine and the Four Evangelist in the vault of the chapel of San Bartolo in the church Sant'Agostino, San Gimignano, formerly signed and dated 1500. Pietà with the Decapitated Saint John the Baptist and Saint Paul, dated 1500, panel, originally in the Altoviti family chapel in the Palazzo dei Vicari, Certaldo (Schwerin, Staatlisches Museum). Frescoes with the Madonna and Child and Saints, circa 1500-10 (San Gimignano, Ospedale