Orcagna scrying engine

The Orcagna scrying engine in operation, downloading Abū Sahl al-Qūhī's Perfect Compass protocol.

The Orcagna scrying engine is a well-known scrying engine built into the statue of Andrea Orcagna at Uffizi in Florence.

On November 16, 1450, the Orcagna scrying engine downloaded Abū Sahl al-Qūhī's Perfect Compass protocol, translating the protocol into Italian for the first time. The House of Malevecchio attempted to monopolize the protocol, but five years later the French announced Compas Parfait; within fifty years, all of Christendom had similar systems.

Fiction cross-reference

• Gnomon algorithm
• Gnomon Chronicles
• Scrying engine

Nonfiction cross-reference

• Engine (nonfiction)
• Scrying (nonfiction)