1475
Toscanelli sets up a gnomon in Florence Cathedral
Astronomer Paolo dal Pozzo Toscanelli opens a hole in the cathedral's dome, about 91 metres above the floor, to cast a meridian line for observing the sun around the summer solstice.
1475
Astronomer Paolo dal Pozzo Toscanelli opens a hole in the cathedral's dome, about 91 metres above the floor, to cast a meridian line for observing the sun around the summer solstice.