Everything about Iran (Persia) on Instagram: "Jamshid al-Kashi (also known as kashani), the great mathematician and astronomer of Persia in the early 15th century, rose during the Timurid era, when Persia (Iran) still bore the scars of the Mongol invasions. While Europe was only beginning to reconnect with science and culture, he measured the heavens with astonishing precision . At Ulugh Beg’s observatory in Samarkand, he calculated π to 16 decimal places, a record that stood for centuries. His