verso: text and illustration: The water clock of the drummers from Kitab fi ma'arifat al-hiyal al-handisaya (The book of knowledge of ingenious mechanical devices) Automata by al-Jazari)

ink, opaque watercolor and gold on paper

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Cavalcade and Pool of Prostitutes

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Cavalcade and Pool of Prostitutes: detail

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Birds and Couples: detail

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Birds and Couples, Couples in Bubble Flower

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Birds and Couples: Topsy-Turvy Man

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, right panel, Hell, lustfull woman and abbess with a pig

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Cavalcade and Pool of Prostitutes: Calvacade at lower left

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, lower portion, Birds and Couples: detail

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, right panel, Hell, lower portion, Musicians and Satan: detail

Hieronymus Bosch; grisaille, oil on wood

The Healing of the Blind Man and the Raising of Lazarus

Berlanga de duero, Spain; 5 ft. 5 in.x 11 ft. 2 1/64 in.; fresco transferred to canvas

Jar with "Saz" spray of composite flowers and feathery leaves

Pottery, Turkey, Ottoman; 1 11/16 in. x 10 55/64 in.; polychrome glazed pottery

The Garden of Earthly Delights Triptych, interior, center panel, pink tower, army of knight mermen, and nude riders

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, upper right: towers and flower shells

Hieronymus Bosch; grisaille, oil on wood

The Garden of Earthly Delights Triptych, interior, center panel, pool and procession of rider

Hieronymus Bosch; grisaille, oil on wood