Armillary Dial

After Roman dials with their vertical obelisk type gnomons,

when did sundials with gnomons in parallel to the planet's axis

first appear? I found an entry in the BSS Glossary 2000

for the introduction of an armillary dial in 1598 by Valentin Pini.

Would he have been the first one to have installed a 'modern' dial?

Is there a history of the development of the dial ?

Best wishes

Heiner Thiessen

51N 1W

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