He was known for his wise policies, his strength as a mage, the commander 72 demons, the king who built the Temple of Israel. 
Secretly summoned by Malisbury Animusphere, the grand magus that participated and achieved victory on the Holy Grail War of Fuyuki.
The wish he entrusted to the Holy Grail was to become human. He became Romani Archaman, a quite ordinary young man in Chaldea.
He sacrificed to erase the last singularity. Although it's hopeless to summon him, somehow he was summoned again.