Plate 9 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 8 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 7 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 6 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 5 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 4 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 3 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 2 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Plate 1 of Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not…

Khunrath Heinrich's (1560-1605) Amphitheatrum Sapientiae, purportedly one of the most significant books of theosophical alchemy and the occult sciences. Though the title page reads 1602, the book was not published until…

An early edition of an anonymous chapbook written probably towards the end of the sixteenth century, on which Robert Greene may have founded his play "The honorable historie of Friar Bacon and Friar Bongay." Many…

Engraved title page of Maranta of Venosa's work on antidotes to poisons.

A collection of four alchemical works ascribed to Ramon Llull (c. 1232-1316), of which three are printed here for the first time: Apertorium, Magia Naturalis, and Tertia Distinctio. The fourth treatise, De secretis…

Work from the "pseudo-Geber" corpus, a group of writings falsely attributed to the Arabic alchemist, Abū Mūsā Jābir ibn Ḥayyān (died c. 806–816, Latinized as “Geber"). These writings are actually from 13th or…

A first edition, Italian work considered to be the earliest printed book on metallurgy published in Europe. The work was written in Venice by Vannoccio Biringuccio (c. 1480 – c. 1539), an Italian metallurgist of Siena,…

A wooden catapult used for hurling an object such as a stone.

War engine with wheels, face, and spikes, apparently used to break up enemy ranks or crush enemy troops.

A soldier ascends a wooden siege ramp.

A soldier ascends a siege ladder equipped with wheels.

A siege bridge with a sliding mechanism for extending across rivers or moats.

A war engine with four wheels in the shape of an animal with the feet of a bird and the head of a lion, operated by three soldiers.

First edition published by Heinrich Stayner of De re militari, a classic work on the science of making war by Publius Flavius Vegetius Renatus, commonly referred to as Vegetius, a writer from the Later Roman Empire…

Illustrated title page with a woodcut after Hans Weiditz by Jörg Brou the elder of Schoeller, showing a military scene with men in armor, some of whom are carrying long swords and spears in front of decorated tents.

On the left is a telescoping siege device powered by a screw mechanism, and on the right is a rope ladder dangling from a castle tower.