1. A painting consisting of two panels, traditionally hinged together.
Diptychs
A painting consisting of two panels, traditionally hinged together.

2. In Late Antiquity, ivory diptychs with covers carved in low relief on the outer faces were a significant art-form: the "consular diptych" was made to celebrate an individual's becoming Roman consul, but some, perhaps including the Poet and Muse diptych at Monza, may have been made for private use. Some of the most important surviving works of the Late Roman Empire are diptychs, of which some dozens survive, preserved in some instances by being reversed and re-used as book covers. The largest surviving Byzantine ivory panel (428 mm × 143 mm), is a leaf from a diptych in the Justinian court manner of c. 525–50, which features an archangel.[2] From the Middle Ages many panel paintings took the diptych form, as small portable works for personal use; large altarpieces tended to be made in triptych form, with two outer panels that could be closed across the main central representation. They
Deesis, 17th-century

3. Andy Warhol
Li Yuan-chia
Joseph Holston

4. Triptychs
is a work of art (usually a panel painting) which is divided into three sections, or three carved panels which are hinged together and can be folded shut or displayed open.