Octagonal Hall - former Rome Planetarium
The profound bond between Rome and the cosmos.
The Octagonal Hall, also known as the former Rome Planetarium, is one of the most fascinating spaces in the Baths of Diocletian complex. Originally part of the imperial baths, this extraordinary circular space is striking for its grandeur and the perfect harmony of its architectural proportions.
Today, the Octagonal Hall hosts exhibitions and installations that combine art, science, and history, breathing new life into a captivating space. Its majestic vaults, once dedicated to contemplating the starry sky, continue to evoke the profound connection between Rome and the cosmos.
An unmissable site for those wishing to discover a lesser-known but fascinating Rome, just a few minutes’ walk from the hotel.
Read more articles
An interactive, multisensory experience dedicated to the great classics and new Disney stories.
An immersive journey through history and technology in the heart of ancient Rome.
52 extraordinary works from one of the most important museums in the United States.
The exhibition compares the historic jewels of the Maison Cartier with the ancient sculptures of the Capitoline collection.
An exhibition that explores Rome's identity and role within the context of major global metropolises.
The Galleria d’Arte Moderna in Rome celebrates its 100th anniversary with GAM 100. A Century of Municipal Gallery 1925-2025.
On December 7, 2025, at 6:30 PM, St. Peter's Square will light up with the traditional inauguration ceremony of the Christmas tree and nativity scene, symbols marking the official start of the holidays in the Capital.
On Sunday, December 7, 2025, many of the capital's civic collections and cultural sites will open their doors free of charge thanks to the Musei in Comune Roma initiative.
Dal 4 dicembre al 6 gennaio, l’Auditorium Parco della Musica si veste di luci, suoni e magia con un calendario ricco di concerti, spettacoli, teatro, danza e eventi gratuiti per famiglie e visitatori.