The Layer Quaternity (
circa 1598–1604) share a number of iconographical details to a complex illustration found in
Alchemia (1606) by the German academic
Andreas Libavius in a chapter entitled
De Lapide Philosophorum (
The Philosopher's Stone) in which two giants support four figures, the lower pair of which are mortal, the upper pair immortal, they form the apex to – "Libavius' monument of the opus.......The completion of the Little Work by
Labor and Industry and
the grace of God (Latin lower captions translated) is followed by
Sol and
Luna ascending on swan's wings.....the thanksgiving by the Arab king and his white wife reading as –
Glory to God on High and
I will exalt thee my God ". (Latin upper captions translated) Libavius' illustration and the marble sculpture of the Layer Quaternity share an identical pairing including a naked figure (lower pair), a bare-legged royal male and a regal draped female (upper pair) as well as the titled captions
Gloria and
Labor, along with the symbols of
palm branch,
rotundum, and moon. The similarities between the captioned phrases of Libavius' illustration to those of the single-word titles of the Layer Quaternity suggest that in time sequence, the Layer monument was based upon and installed before 1606, the publication date of Libavius' illustration. Biblical verse which parallels the symbolism of each captioned entity includes for the lower and mortal pair –
Then I looked on all the works that my hands had wrought, and on the Labour that I had laboured to do: and, behold, all was Vanity and vexation of spirit, and there was no profit under the sun.
Ecclesiastes 2.v.11 With an antithetical response from the upper, immortal,
Heavenly pair –
Glory to God in the highest, and on earth Peace, goodwill to all men. Luke 2 v.14 The Layer Quaternity also corresponds to the alchemical 'deities'
Apollo,
Luna,
Mercurius and
Vulcan as named in emblem XVII of
Atalanta Fugiens (1617) by the German alchemist-physician
Michael Maier. ==Interpretation==