The Temple of Isis is near the Odeon and the Teatro Grande, in the VIII Regio of Pompeii. It was built at the end of the II BC. and damaged by the earthquake of 63 AD. Numerius Popidius Ampliatus had it rebuilt at his own expense in the name of his son Celsinus, as we know from an inscription found in the site.

 Discovered and excavated between 1764 and 1766, at that time it was very well preserved and was even visited by Amadeus Mozart. It is surrounded by a high wall, with an entrance leading to the inner portico, decorated with magnificent 4th style frescoes.

Fortunately the frescoes were detached to preserve them from weathering; today they are in the National Archaeological Museum of Naples. In the main part there are small panels pictures with Nilotic landscapes. In one panel there is Harpocrates with the Temple in the background, in others the priests assigned to the cult and Anubis.

 At the center of the portico is the Temple, above a high podium accessed by means of a stair. There was the door to the small shrine, where a base for the statues of Isis and Osiris was found. Here was a statue of the goddess, that now is in the Archaeological Museum of Naples

 In a corner of the portico there is a small building decorated with wnderful stuccoes, with a staircase going down to a small cistern where the sacred water was kept (hinting to the water of the Nile), which was used for worship ceremonies. In front of the building there was an altar for sacrifices.

 Isis was a Mother Goddess who regulated Life and Death, and in the aretalogies (hymns in her honor) she proclaims: ′′I separated Earth from Heavens. I showed the way to the Stars. I established the course of the Sun."
She was linked to the cycles of the Seasons and the fertility of the Earth. Her Temple was near the Teatro Grande and the Odeon, where the processions in honor of the goddess described by Apuleius probably arrived, and sacred representations dedicated to her were performed.

 To underline the relationship of the goddess with the Sun, in the days of the Summer Solstice, the Romas had the feast of Fors Fortuna, an ancient Italian goddess later identified with Isis.
At Hadrian's Villa in Tivoli during the days of the Summer Solstice the illumination (hierophany) of the Blade of Light is seen in the building of Roccabruna. Probably it was a temple dedicated to Isis, as we explain in our book “Villa Adriana. Architettura Celeste. I Segreti dei Solstizi” dedicated to our discoveries of Archaeoastronomy at Villa Adriana.