Measures of the Earth Obliquity during the 1701 Winter Solstice at the Clementine Meridian Line in Rome

Alexandre Humberto Andrei, Costantino Sigismondi, Veronica Regoli

The great meridian line in the Basilica of Santa Maria degli Angeli in Rome was built in 1701/1702 with the scope of measuring the obliquity of the Earth's orbit in the following e…