The study of contemporary historic sources affords us a clinical picture of
the epilepsy of the Byzantine Emperor, Theodore II Lascaris (1254-1258). I
t appears that he suffered from an epileptic disorder of rather generalized
tonic-clonic type (grand mal), which started to afflict him in all probabi
lity before the age of 30 years. Numerous incidents described by many histo
rians of his entourage reveal that he also had serious behavior disorders t
hat the famous Byzantine historian, George Pachymeres, directly attributed
to his disease.