Jacob van Almaengien (~1440-1506) in Bosch's Paintings Fraenger discovered Jacob van Almaengien in Cuperinus' “Kroniek of s'Hertogenbosch” and then attempted to make him into the “Hochmeister” of an obscure sect in Brabant. This cost him the attention of the art-historical profession. Today, Almaengien is a non-person in art history. However, any close reading of Bosch's paintings cries for a mentor, who read Hebrew and was educated in the philosophy of the 15^th century. Bosch at 18 did not have the knowledge of Neo-Platonism, which he painted in the “Garden Triptych”, nor that of the Hebrew version of the “Song of Mose”, which underlies the “Table of the Seven Deadly Sins” and the “Temptation of St. Anthony Triptych” near the end of his active life. The time was 50 years before Luther's Bible translation from the Hebrew original! Jacob van Almaengien is required for any meaningful, critical interpretation of Bosch's work, and his life-long influence on Bosch is the simplest suggestion compared to alchemy, psychology, astrology, or anthroposophy. Paul Klein's scientific dating of Bosch's paintings allows one to follow the co-operation of Bosch and Almaengien with only a few imaginative interpolations. The following table reproduces Jacob's appearances in Bosch's paintings in chronological order.
	Painting, location of painting and date	Additional comments
	Garden Triptych Center Panel in the cave Jeroen, Jacob and Sibylle Prado, Madrid 1468	Jacob at age 28 Jeroen 18 years old
	Garden Triptych Left Wing Prado, Madrid 1468	Betrothal of Jacob and Sibylle by Christ, the founding of the New Covenant Jacob 28
	Wedding at Cana Jacob and Sibylle Copy Rotterdam 1570 Original painting 1473 or later	Idealised portrait of Jacob at his wedding 1470 30 years old
	Wings of a Last Judgment Trptych Palazzo Ducale, Venice 1491	Idealized portrait of Jacob at 51
	The Pridgal Son Rotterdam 1495	Jacob's return to Den Bosch at 55
	St. John Evangelist dedicated to the admission of Jacob (now Sint Jan) into the Brotherhood of Our Lady in s'Hertogenbosch Berlin only dated painting by Bosch 1496/97	Jacob 55 Highly idealized portrait after Jacob's baptism and admission to the Brotherhood 1496
	Christ Bearing the Cross Vienna 1499	Jacob at 59
	Christ Bearing the Cross Escorial 1499	Jacob at 59
	The Temptation of St.Anthony Left Wing Rescue of St. Anthony Lisbon 1502	Jacob in red coat at 62
	The Haywain 1 Outside of the closed panels Escorial 1505	An idealised Jacob at 63
	Sicut Erat in Diebus Noë The Flood 4 side-wing panels Rotterdam 1515	Jacob rescues Sibylle (1471) Remembering the events of 1468-73 when Jacob was 31
	Sicut Erat in Diebus Noë The Flood 4 side-wing panels Rotterdam 1515	Jacob's vision (1472) Remembering the events of 1468-73 when Jacob was 32
	Sicut Erat in Diebus Noë The Flood 4 side-wing panels Rotterdam 1515	Jacob discovers the drowned Sibylle and her Child (1477) Remembering the events of 1477 when Jacob was 37
	The Adoration of the Child Copy Cologne 1568 Original 1497	Painted 1497 on the 20th anniversary of Sibylle's death in 1477 at the time of the painting Jacob was 57 years old