On the front gate, the sarcophagus, and the walls of Cappella Colleoni in Bergamo, you can see the coat of arms of the Colleoni family, which consists of three testicles. The origins of this unusual coat of arms likely stem from the etymological connection of the family name Colleoni and coglioni, the vulgar Italian term for testicles. So far, so good, but why three? Rumor has it that Bartolomeo was affected with polyorchidism, a rare congenital anomaly endowing one with an extra testicle. Appealing as this explanation may be, there…