The harbour temple was the second-largest temple in the city after the Capitol. Like every Roman temple, it would have been dedicated to a deity, but we do not know which. The harbour temple was given its unusual name during the excavations, on account of its proximity to the harbour.
Selected parts of the temple have been reconstructed on a three metre high podium. A number of full-size pillars have been reconstructed and roof beams fitted to give some impression of the effect created by this magnificent edifice with its total height of 27 metres. Details have been reproduced on the basis of innumerable fragments found during the excavations.
One of the pillars has been painted in colour to illustrate the temple's originally magnificent colouring. Wide steps lead up to the temple's podium and its cella where the ritual acts took place. In antiquity, this was the prerogative of a select group of people; ordinary mortals were not allowed inside.
The temple's foundation plate and innumerable fragments were discovered during the excavations in 1977 and the following years. Several of these fragments are on display in the new Roman Museum. The foundation plate can now be reached via an entrance at the back of the temple, for the reconstructed building stands over it like a protective building. Interested visitors will find many archaeological traces dating back to the days when the temple was built almost two thousand years ago.