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Quadrant
Signed by Giovanni Battista Giusti
Later 16th century; Florence
Gilt brass; 90 mm in radius

This small, gilt brass quadrant is provided with a red leather case lined with velvet of the same colour. On the front of the quadrant are a small compass and a scaphe sundial with a small cover. At the centre is a small relief depiction of a mask. On the opposite face are a horary quadrant for a latitude of 42? (Rome), and a magic square.

This precious instrument belonged to Pope Gregory XIII. The author, Giovanni Battista Giusti, was an instrument maker in Florence during the 1560s.

Istituto e Museo di Storia della Scienza, Firenze
Inventory no. 2525

© Istituto e Museo di Storia della Scienza, Firenze. All rights reserved. Information and images provided here may not be reproduced in any form or by any means without the prior written permission of the museum.

Basic URL: http://www.mhs.ox.ac.uk/epact/catalogue.php?ENumber=75930

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