Renaissance astronomy

Renaissance astronomy

During the summer solstice, an amazing spectacle can be witnessed in Florence cathedral. The sun’s rays fall through a small opening in Brunelleschi’s dome, forming a disk of light that overlaps perfectly with the marble engravings on the floor of the chapel of the Cross, to

bookmark
Thu 20 Jun 2013 12:00 AM

During the summer solstice, an amazing spectacle can be witnessed in Florence cathedral. The sun’s rays fall through a small opening in Brunelleschi’s dome, forming a disk of light that overlaps perfectly with the marble engravings on the floor of the chapel of the Cross, to the left of the high altar.

 

This phenomenon has occurred in the Duomo since 1475, the result of an ancient astronomical instrument known as a gnomon, which tracks the sun’s position in the sky and determines the length of the calendar year. A bronze tablet with a small opening, it is placed horizontally in the south window of the dome, 90 metres above the floor. The sun’s rays pass through the hole and hit the floor of the church for a few minutes shortly before and after noon. Documents in the Opera di Santa Maria del Fiore archives suggest that the gnomon was installed by Florentine mathematician Paolo Dal Pozzo Toscanelli.

 

Witnessing the event is free, accessible from porta dei Canonici (on via della Canonica) between 12:30 and 1:30pm on June 21 and 28.

Related articles

NEWS

Public transport in Florence and Tuscany becomes contactless

Visa cardholders can ride for free from April 10 to May 5, 2024.

NEWS

Sephora opens flagship store in via dei Calzaiuoli

Highlights include make-up services and just-released beauty ranges.

NEWS

Changes at the Uffizi

Paperless ticketing, evening and the occasional Monday openings

LIGHT MODE
DARK MODE