An Attic Black-figured Siana Cup, attributed to the Heidelberg Painter, circa 560-550 B.C.

Münzen und Medaillen AG, Basel, Kunstwerke der Antike, Auktion 51, March 14th-15th, 1975, no. 120, illus.
Professor Hans Erlenmeyer (1900-1967) and Marie Louise Erlenmeyer, Basel (Sotheby's, London, Antiquities from the Erlenmeyer Collection, July 9th, 1990, no. 177, illus.)

Münzen und Medaillen AG, Basel, Kunstwerke der Antike, Auktion 22, 1961, p. 62, fn.
Konrad Schauenburg, “Eine neue Sianaschale,” Archäologischer Anzeiger, vol. 77/4, 1962, p. 746, no. 3
John D. Beazley, Paralipomena: Additions to Attic Black-Figure Vase-Painters and to Attic Red-Figure Vase-Painters, Oxford, 1971, 27. 58 bis
J.J. Maffre, “Céramique attique à décor mythologique trouvée à l’Artémision de Thasos,” Bulletin de Correspondance Hellénique, vol. 5, 1979, p. 51, fig. 30
L. Burns and R. Glynn, Beazley Addenda. Additional References to ABV, ARV2 and Paralipomena, Oxford, 1982, p. 6, no. 66.58 bis
T.H. Carpenter, T. Mannack, and M. Mendonca, Beazley Addenda, 2nd ed., 1989, p. 18
H. Brijder, Siana Cups II: The Heidelberg Painter (Allard Pierson Series, vol. 8), Amsterdam, 1991, pls. 110b-c and 111a
Lexicon Iconographicum Mythologiae Classicae, vol. V, s.v. “Herakles,” no. 2108 (I), pl.62
Beazley Pottery Archive Database no. 350191, illus.

The theme of Herakles carrying the Erymanthian boar is depicted in the tondos of three other cups by the Heidelberg Painter but is completely preserved in the present example only. The Sotheby's London catalogue notes that "if the scene is viewed upside down, the protagonists' roles are reversed: the boar seems to run while carrying a kicking Herakles on its back."

The exterior of the present cup shows the only known cavalcades by the Heidelberg Painter.