The altarpiece was divided into several pieces, probably in the 18th century, & has now been reassembled. The fragments entered the Collection at different dates. The main panel shows the Trinity (NG 727); with an angel on the right (NG 3162); & an angel on the left (NG 3230); Saints Zeno & Jerome (NG 4428); Saints James the Great & Mamas (L15, on loan from Her Majesty The Queen). The altarpiece was commissioned in September 1455 by the Company of Priests of the Trinity in Pistoia; hence it represents the Trinity, &
Includes:: relevant saints. When Pesellino died in July 1457, the painting was finished by Fra Filippo Lippi, & delivered in June 1460. The predella shows Mamas in Prison thrown to the Lions (NG 4868.1); the Beheading of James the Great (NG 4868.2); Zeno exorcising the daughter of the Emperor Gallienus (NG 4868.3); & Jerome & the Lion (NG 4868.4). The predella was probably painted by Lippi & his workshop in Prato, between 1458 & 1460. A fifth predella panel showing the vision of Saint Augustine while pondering the mystery of the Trinity has recently been discovered in the Hermitage, St Petersburg.