The Temple of Hadrian (Templum Divus Hadrianus) was dedicated to the deified emperor Hadrian (r. 117-38) by his adopted son and successor Antoninus Pius (r. 138-61) in 145 C.E.
All that has survived of the temple are eleven marble columns, one wall of the cella and two dozen decorative relief panels.
The buildings on the north and east side of Piazza di Pietra follow the line of the colonnaded square portico which enclosed the temple. The portico was entered by a triumphal arch (long since demolished) on Via Lata (now Via del Corso).