Sporus of Nicaea

Sporus of Nicaea was a Greek mathematician and astronomer, (c. 240 – c. 300), probably Nicaea (Greek Nikaia), ancient district Bithynia, (modern-day Iznik) in province Bursa, in modern-day Turkey.
Much of his work focused on squaring the circle and reproducing cubes, both in his own attempts at these problems or in criticizing the work of other contemporary mathematicians.
Sporus also criticized Archimedes for not producing a more accurate approximation of π.