This panel and its three companions at the Gallery—Saint Matthew, Saint Simon, and Saint Judas Thaddeus—together with six other busts of apostles [fig. 1] [fig. 1] Archival photograph, c. 1925, old state, Simone Martini, Saint Judas Thaddeus, c. 1315/1320, tempera on panel, National Gallery of Art, Washington, Samuel H. Kress Collection. Image: Galerie van Diemen, Berlin [fig. 2] [fig. 2] Archival photograph, c. 1925, old state, Simone Martini, Saint Simon, c. 1315/1320, tempera on panel, National Gallery of Art, Washington, Samuel H. Kress Collection. Image: Galerie van Diemen, Berlin [fig. 3] [fig. 3] Archival photograph, c. 1925, old state, Simone Martini, Saint Andrew, c. 1315/1320, tempera on panel, The Metropolitan Museum of Art, New York, Maitland F. Griggs Collection, Bequest of Maitland F. Griggs, 1943. Image: Galerie van Diemen, Berlin [fig. 4] [fig. 4] Archival photograph, c. 1925, old state, Simone Martini, Saint Bartholomew, c. 1315/1320, tempera on panel, The Metropolitan Museum of Art, New York, Maitland F. Griggs Collection, Bequest of Maitland F. Griggs, 1943. Image: Galerie van Diemen, Berlin [fig. 5] [fig. 5] Archival photograph, c. 1925, old state, Simone Martini, Saint Matthew, c. 1315/1320, tempera on panel, National Gallery of Art, Washington, Samuel H. Kress Collection. Image: Galerie van Diemen, Berlin [fig. 6] [fig. 6] Archival photograph, c. 1925, old state, Simone Martini, Saint Thomas, c. 1315/1320, tempera on panel, The Metropolitan Museum of Art, New York, Maitland F. Griggs Collection, Bequest of Maitland F. Griggs, 1943. Image: Galerie van Diemen, Berlin [fig. 7] [fig. 7] Archival photograph, c. 1925, old state, Simone Martini, Saint James Major, c. 1315/1320, tempera on panel, National Gallery of Art, Washington, Samuel H. Kress Collection. Image: Galerie van Diemen, Berlin [fig. 8] [fig. 8] Archival photograph, c. 1925, old state, Simone Martini, Saint Philip, c. 1315/1320, tempera on panel, location unknown. Image: Galerie van Diemen, Berlin [fig. 9] [fig. 9] Archival photograph, c. 1925, old state, Simone Martini, Saint James Minor, c. 1315/1320, tempera on panel, Salini collection, Castello di Gallico, Asciano, Siena. Image: Galerie van Diemen, Berlin [fig. 10] [fig. 10] Archival photograph, c. 1925, old state, Simone Martini, Saint Matthias, c. 1315/1320, tempera on panel, The Metropolitan Museum of Art, New York, Maitland F. Griggs Collection, Bequest of Maitland F. Griggs, 1943. Image: Galerie van Diemen, Berlin, originally formed part of a polyptychType of object with several panels, usually an altarpiece, although it may also fulfil other functions. The polyptych normally consists of a central panel with an even number of side-panels, which are sometimes hinged to fold. Although in principle every object with two panels or more may be called a polyptych, the word is normally used as a general term for anything larger than a triptych. As with diptychs and triptychs, the size and material can vary.
—Victor M. Schmidt, Grove Art © Oxford University Press. The ten panels, acquired as a group by Johann Anton Ramboux in the early nineteenth century, remained together until the 1920s, when they were deaccessioned by the Wallraf-Richartz Museum in Cologne and dispersed.
The horizontal graining of the wood of the support in all ten panels suggests they are fragments of a predellaA horizontal band, cut from a single plank, below the main panels of an altarpiece. The appearance of the predella can be seen as part of the development of the altarpiece from a single panel to a large, multilevel polyptych. The small figures or scenes painted on the predella formed part of the integrated program of the altarpiece, providing a visual commentary on the major images above and at the same time physically raising the main panels, thus improving their visibility.
—Ronald Baxter, Grove Art © Oxford University Press. The type of predella formed of busts of saints placed below round arches is rather archaic: in fact, it appears in Sienese painting no later than the years around 1320. Subsequently, preference was given instead to the insertion of narrative scenes in the predella; if busts of saints were included in the program, they were usually inserted in circular or mixtilinear medallions surrounded by painted ornamental motifs.