Also known as Castellum Tidditanorum, Tiddis was established by the Romans around the 4th century BC.
From Schoder's lecture notes:
TIDDIS: Castellum Tidditanorum, primarily religious center, on fine hill site 6 miles NW of Constantine.
Gen. view fr. NW, w. Constantine at horizon.
N. Gate, w. East gate behind. Red stone.