The steps leading up to the enclosed space, has maintained the external architecture feature of columns that have been seen with for example the Acropolis, except in this building structure, people are guided to one entrance through one set of steps. The Temple of Portunus or Temple of Fortuna Virilis ('manly fortune') is one of the best preserved of all Roman temples. He may have originally protected the warehouses where grain was stored, but later became associated with ports, perhaps because of folk associations between porta "gate, door" and portus "harbor", the "gateway" to the sea, or because of an expansion in the meaning of portus. Portunus was the ancient Roman god of keys, doors, livestock and ports. Temple of Portunus is from c. 120-80 B.C.E. The Parthenon was built to replace a temple that had previously stood on the site but was destroyed by Persian invaders. The Temple of Portunus (Italian: Tempio di Portuno) is an ancient building in Rome, Italy, the main temple dedicated to the god Portunus in the city.It is in the Ionic order and is still more familiar by its erroneous designation, the Temple of Fortuna Virilis ("manly fortune") given it by antiquaries. Its dedication remains unclear, as ancient sources mention several temples in this area of Rome, without saying enough to make it clear which this is. The Temple of Portunus dates from the Roman Republic period, which reflects both on Etruscan and Greek practices. Like the Etruscans, the Romans built urban temples in commercial centers as well as in special sanctuaries. The altar no longer exists, but would have stood at the bottom of the steps. meaning this temple church is more than 2000 years old. The Temple of Portunus is a small late-republican-era temple which overlooks the Tiber River in a park-like area across the street from Santa Maria in Cosmedin. Next to the Tiber, in an area that was once a harbour in Roman times; this is why the temple was believed to be dedicated to Portunus, a god of harbours and ports.

Construction on the Parthenon began in 480 B.C. and took about 48 years to complete. The primary purpose of the previous temple was to house a large statue of the goddess Athena. You'll often see the temple misnamed as the Temple of Fortuna Virilis, but the temple was actually dedicated to the river god Portunus.