![📅 In the 1570s Father from Perugia - , , "anemographer", Dominican - actively partook in fulfilling one of '...](https://img5.travelagents10.com/094/575/1145183440945759.jpg)
12/01/2025
📅 In the 1570s Father from Perugia - , , "anemographer", Dominican - actively partook in fulfilling one of 's greatest wishes and ambitions: to have the great honor to finally "fix" the Julian , in which the was no longer aligned to the solar (LINK IN BIO to learn more about it).
💫⭐🌟 Egnazio Danti constructed two instrument (a and two equinoctial 'armillae') on the façade of the , so to better catch the sun beams.The quadrant is made of several smaller solar quadrants with six each of them measuring time in six different ways. These include: the “oriolo all'Italiana” (Italian dial), which begins at sunset and counts 24 hours; the “oriolo boemico” (Bohemian dial), which begins at dawn; the “astronomical dial”, which begins at midday and counts 24 hours; the “oriolo comune de' Franzesi, Tedeschi, Spagnoli” (the dial used by the French, Germans, and Spaniards), which begins at midday and counts 12 hours, beginning again at midnight; a planetary dial; a canonical dial. They date back to 1572, while the ‘armillae’ date back to 1574.
🌌🌠 One of the equinoctial armillae lies parallel to the plane. Understanding, as he did, Florence’s latitude (43° 40'), Danti tilted the armilla so that it would align perfectly. The ring perpendicular to the wall is the line, from North to South. When the Sun is at zenith with the Celestial – i.e., when the rays of the sun are perpendicular to the Equator itself – we have an Equinox. This is the day of the year when night is equally long as daylight (from "aequus", which means ‘equal’, and "nox", which means ‘night’).
At midday of the Solar Equinox, this projects a perfect cross-shaped shadow on the church’s façade. It was essential to know the day of the to be able to calculate the – especially when it came to Easter, with its ancestral Christian significance of sunrise and rebirth. Unfortunately, those armillae weren’t able to measure the Equinox but with a discrepancy of eight hours.