The temple of peace also called the forum of Vespasian
Entirely eastward, directly behind the temple of Romulus lies the peace forum, also called the Forum of Vespasian. Barely anything has survived. It was commissioned by Vespasian. The entire complex was a large, rectangular square surrounded by colonnades. The peace temple was at the back, as a commemoration of the peace treaty following a long period of civil wars. In this temple, which was not elevated, the loot was kept that was brought in by Vespasian’s son Titus from Jerusalem. Both sides of the temple had libraries and colonnades with famous statues.
Forum of Nerva
“The Forum of Nerva was the fourth and smallest of the imperial fora. Its construction was started by Emperor Domitian before the year 85 AD, but officially completed and opened by his successor, Nerva, in 97 AD, hence its official name. This street had long served as a market area, especially for booksellers and cobblers; the new forum continued to serve as both a thoroughfare and as a monumental entrance to the larger Roman Fora.”
“The plan of the Forum of Nerva is long and narrow, with protruding columns decorating the walls instead of arcades. A temple dedicated to Minerva dominated the western end, behind which was a monumental entrance.”
Cited from Wikipedia