his mnemotechnic devices and 'art of memory' (later to influence modern computation) derive from devices from the preceding islamic tradition in andalusia (see

his mnemotechnic devices and 'art of memory' (later to influence modern computation) derive from devices from the preceding islamic tradition in andalusia (see https://en.wikipedia.org/wiki/Zairja https://en.wikipedia.org/wiki/Zairja) There are deep connections between the functions of geometry and geometry influenced aesthetics, the zairja tradition, and several other things.