Pre-Columbian Guanacaste-Nicoya Polychrome Bowl, Guanacoste Region, Costa Rica, ca. 1450. A finely decorated polychrome bowl with a rich, burnished orange ground, ornamented in red, brown, and black linear pigments. The vessel features a highly structured geometric composition of angular panels and stepped-fret motifs, arranged in a rhythmic pattern around the body. The bold geometric ornament and warm palette are characteristic of the sophisticated polychrome ceramic tradition of the Guanacaste-Nicoya region. Donated to The National Headache Foundation by Antiques Ltd. Merchandise Mart, Chicago, 9 May 1988. H. 3 1/2" Dia. 9 1/8" (8.9 cm x 23.2 cm)..