The largest Roman temple in Istria is located at the very tip of the Poreč peninsula. It was built in the 1st century, and is known as the Great Temple.
The temple was dedicated either to Mars or to Jupiter, or the Capitoline Triad (Jupiter, Juno, Minerva). The preserved remains confirm that it was an imposing building (30 x 15.5 m). It was built on the highest point of the peninsula, and it was reached from the forum by a stone staircase.
It was probably a temple of amphiprostyle type, with six columns at the front and four at the back, rising on the characteristic high base (stylobate).
There are relatively few parts preserved: some fragments of the gables, columns and capitals, now mostly settled in the temple area.