The sellisternium or solisternium was a ritual banquet for goddess

Goddess

A goddess is a female deity. In some cultures goddesses are associated with Earth, motherhood, love, and the household. In other cultures, goddesses also rule over war, death, and destruction as well as healing....

es in the Ancient Roman religion. It differs from other goddess banquets in that the divinities were all seated on chair

Chair

A chair is a stable, raised surface used to sit on, commonly for use by one person. Chairs are most often supported by four legs and have a back; however, a chair can have three legs or could have a different shape depending on the criteria of the chair specifications. A chair without a back or...

s, as opposed to reclining on couches, as in the lectisternium

Lectisternium

In ancient Roman religion, the lectisternium was a propitiatory ceremony, consisting of a meal offered to gods and goddesses. The word derives from lectum sternere, "to spread a couch." The deities were represented by their busts or statues, or by portable figures of wood, with heads of bronze,...

. Additionally, they were placed apart from the male gods, their consorts and family.

The ceremonial banquets where a sellisternium would be depicted were traditionally held by women. According to Tacitus

Tacitus

Publius Cornelius Tacitus was a senator and a historian of the Roman Empire. The surviving portions of his two major works—the Annals and the Histories—examine the reigns of the Roman Emperors Tiberius, Claudius, Nero and those who reigned in the Year of the Four Emperors...

 (Annales 15.44), one such sellisternium was held for Juno

Juno (mythology)

Juno is an ancient Roman goddess, the protector and special counselor of the state. She is a daughter of Saturn and sister of the chief god Jupiter and the mother of Mars and Vulcan. Juno also looked after the women of Rome. Her Greek equivalent is Hera...

/Hera, while the secular games

Secular games

The Secular Games were a religious celebration, involving sacrifices and theatrical performances, held in ancient Rome for three days and nights to mark the end of a saeculum and the beginning of the next...

 had one for Juno and Diana

Diana (mythology)

In Roman mythology, Diana was the goddess of the hunt and moon and birthing, being associated with wild animals and woodland, and having the power to talk to and control animals. She was equated with the Greek goddess Artemis, though she had an independent origin in Italy...

/Artemis. According to Macrobius, a seated banquet of the gods and goddesses alike was part of the Herakles cult.