The Labyrinth. ORB: Medieval Science and Technology Index. Epact: Scientific Instruments of Medieval and Renaissance Europe. Epact is an electronic catalogue of medieval and renaissance scientific instruments from four European museums: the Museum of the History of Science, Oxford, the Istituto e Museo di Storia della Scienza, Florence, the British Museum, London, and the Museum Boerhaave, Leiden. Together, these museums house the finest collections of early scientific instruments in the world.
Epact consists of 520 catalogue entries and a variety of supporting material.