Giovanni Bonsi

Giovanni Bonsi, sometimes recorded in scholarship as Giovanni di Bonsi, was a painter active in Florence. Sources place his documented activity between 1351 and 1371, and describe him as born before 1348. His death is not fixed to an exact date: one German-language reference gives it as circa 1376, and English-language sources note that he is absent from Florence's 1376 tax register, which is generally taken as evidence that he had died by that year. No place of birth or death, and no school, workshop, or apprenticeship record, survives in the sources available for this profile.

His one securely signed and dated work is a polyptych of the Madonna and Child with Saints Onuphrius, Nicholas of Bari, Bartholomew, and John the Evangelist, dated 1371 and held today by the Pinacoteca Vaticana at the Vatican Museums. The Vatican identifies this as the only work Bonsi ever signed, and it is the anchor for every other attribution to his hand, including a divided triptych whose panels are now split between the San Diego Museum of Art and the Denver Art Museum, and paintings in the Museo dell'Opera del Duomo in Prato.

There is no body of modern art criticism for a fourteenth-century painter with this few documented works. The most substantive institutional assessment comes from the Vatican Museums, which describes Bonsi as an artist "distinguished in the panorama of Florentine painting," in its account of the 1371 polyptych. Beyond that institutional framing, the dossier located no named critic's assessment in a major outlet, and no record of exhibitions, honors, or awards, which is consistent with a painter known almost entirely through a handful of surviving panels rather than through a public exhibition history.

Bonsi's market consists of two documented auction appearances at Dorotheum in Vienna, both apparently the same panel. It sold on 22 March 2001 as lot 43, catalogued under the spelling "Giovanni Bonzi," for 1,400,000 Austrian schillings, which Dorotheum itself later restated as roughly EUR 101,700. The same panel, now catalogued under the standard spelling Giovanni Bonsi, returned to Dorotheum on 25 April 2017 and sold for EUR 87,500, a lower price than it had achieved sixteen years earlier. The dossier used for this profile could not confirm the exact title of the 2001 lot, and no other major auction house appears in the searchable record for this artist. This is, in short, a market of one traceable object rather than a track record, and the name variant "Bonzi" versus "Bonsi" is itself part of the provenance trail.

Any object offered as a work by Giovanni Bonsi should be weighed against the fact that his entire documented market is two Dorotheum sales of what is very likely a single painting, cited under two different spellings of his name. There is no catalogue raisonne, no certificate-of-authenticity program, and only one securely signed work against which stylistic attributions can be checked. For a name this rare, provenance documentation and comparison to the Vatican polyptych and the divided San Diego and Denver panels matter more than any single price point, and a buyer should expect wide uncertainty bands on both authorship and value.