The Hermetic Museum

The engraving is a complex Hermetic (related to the mystical teachings of Hermes Trismegistus) emblem. It illustrates the "Macrocosm" (the universe) and the "Microcosm" (the human or the laboratory scale). At the top, the Sun and Moon represent the primary polarities of alchemy, while the three figures on the hill represent the Tria Prima—Sulfur (Fire), Mercury (the Hexagram), and Salt (Water). The cave below, with seven seated figures, represents the seven planetary metals or the "Seven Sages" of the Rosicrucian tradition, seeking wisdom in the depths of the earth.

What exists in the realms above, is also found in the things below: original: "Quæ ſunt in ſuperis, hæc inferioribus inſunt"
What the heavens reveal, the earth often holds. original: "Quod monſtrat cœlum, id terra frequenter habet."
Fire and Water are two flowing contraries: happy are you, original: "Ignis, Aqua et fluitans duo ſunt contraria: felix,". The "flowing" likely refers to the spirit or Air that mediates between the heat of fire and the moisture of water.
If you unite such things: let it be enough for you to know! original: "Talia ſi jungis: ſit tibi ſcire ſatis!"

The initials "D.M. à C.B. P.L.C." refer to the author Daniel Mögling (who often wrote under the name Theophilus Schweighardt), a physician and mathematician from Constance. P.L.C. stands for Poeta Laureatus Caesareus, a prestigious title indicating he was a poet recognized by the Holy Roman Emperor.