The Temple of Venus

“Pompeii became the Roman colony of Colonia Cornelia Veneria Pompeianorum in 80 B.C., nine years after it had been besieged and taken by the Roman general and dictator Lucius Cornelius Sulla. Lead sling-shot was certainly used in this attack, and, along with stone balls fired by Sulla´s artillery, it is found in several areas inside the northern wall of the city where the siege was most fierce. Lead sling-shot was also found at the temple of Venus mixed in with the deposits of building rubble used to create the sanctuary terrace. This places the commencement of construction in the period after 89 and suggests that the rubble deposited for the terrace came from buildings that were damaged or destroyed in the Roman attack and subsequently demolished."
 (source: University of Sheffield)

The Temple of Jupiter

The Temple of Jupiter is approximately 10 Roman feet high and 125 feet long.  Half of the structure’s length is cella.  The pediment consists of 6 Corinthian columns about 28 feet high.  According to “Pompeii: It’s Life and Art”, “The high podium also, with steps in front, is characteristics of Etruscan, or at least of early Italic religious architecture.  On the other hand, the architectural forms of the superstructure are Greek, and these in turn have had their influence upon the plan.”  A large head of Jupiter was found in the cella with a dedication to Jupiter Optimus Maximus the ruling master deity of Rome.

Temple of Isis

"The building consists of a large rectangular space marked off by walls, within which is the cella of the god raised up on a pedestal and standing in a splendid niche. Of interest and great elegance is the small temple - with its plaster decorations - situated in the peristyle and used for the preservation of the Nile water considered to be holy by the members of the cult of the Egyptian goddess Isis. Adjacent to the temple there is also a space to accommodate the priests' houses and for the meeting of the faithful.”  The structure of the Temple of Isis points to a time just after the founding of the Roman colony.  The colonnade was fifty by sixty Oscan feet, but due to its growth in worshippers, it was decided to enlarge the sanctuary most likely during the time of rebuilding.  Though the cult of Isis and Osiris is from ancient Egyptian times, the Temple of Isis in Pompeii resembles nothing of Egyptian architectural style.

Temple of Apollo

“Marcus Porcius, son of Marcus; Lucius Sextilius, son of Lucius; Gnaeus Cornelius, son of Gnaeus; Aulus Cornelius, son of Aulus, quattuorvirs, awarded the contract for its construction, in accordance with a decree of the town councilloprs.”  Alison and Melvin Cooley confers this is the inscription on both sides of the large altar in front of the Temple of Apollo. 

The temple was built in the 3^rd century B.C.  It consisted of 48 Ionic columns but during Nero’s reign they were changed to Corinthian columns.  A brief description by August Mau and Francis Willey Kelsey, authors of “Pompeii:  It’s Life and Art” , express that in the cella stands a block of tufa having the shape of a half of an egg; “this is the Omphalos, the familiar symbol of Apollo.”  The temple also consisted of other deities like Diana, and possibly Mercury.  
(source: Pompeii: Its Life and Art, by August Mau, Francis Willey Kelsey)