Epilepsy
Romans called epilepsy by various names, including "morbus caducus" [the falling sickness] and "morbus comitialis" [disease of the assembly hall]. It is still sometimes referred to as the falling sickness, but the idea that it was the disease of the assembly hall seems just bizarre. The explanation for it is that if someone had an epileptic attack in the assembly, it had to be shut down for ritual purification. Read more about the Romans and epilepsy.