Caelum Via

Caelum Via Hotels & Resorts Insomnia is a hotel that towers over the city of Insomnia near the Citadel building in the Final Fantasy XV Universe. It first appeared as the opening location for Final Fantasy Versus XIII as the location for the treaty-signing celebrations for the armistice between Niflheim Empire and the Kingdom of Lucis. It still serves this purpose in Kingsglaive: Final Fantasy XV, where it appears as a location. The bare bones model of the area appears in Final Fantasy XV as part of the Insomnian cityscape, but bears little resemblance to the location's finished form as seen in the film. Posters depicting the aquarium at the hotel rooftop are found in the city

The hotel is known for its lavish rooftop recreation area, the lavish aquarium, and the painting of Etro by Yoshitaka Amano. The concept artwork for Kingsglaive forgoes the aquarium part, but it appears in the movie. In the Versus XIII trailers the aquarium and the painting of the goddess were in different parts of the glass dome, but in the movie the painting is inside the aquarium. The aquarium had a shark in the 2011 Versus XIII trailer. The hotel no longer has the dome in the movie, but three domes appear in where the hotel should be in the Final Fantasy XV finalized cityscape of Insomnia.

A scene where Noctis Lucis Caelum meets Stella Nox Fleuret was made as the envisioned opening scene for Final Fantasy Versus XIII. The two would meet at the treaty-signing party held at the hotel. Noctis would meet Stella at the rooftop dome that had a colossal aquarium and the painting of goddess Etro. In the first version the painting was being held by a grim reaper statue, but in the 2011 trailer there is no statue and the painting is much smaller. The party was then interrupted by Niflheim ramming a magitek engine through the glass dome and the area was invaded by the imperial infantry.

The scene is re-imagined for Kingsglaive: Final Fantasy XV where the sovereigns of Niflheim and Lucis attend the party at the hotel to celebrate the treaty-signing that is to take place the following day. Lunafreya Nox Fleuret, who replaces Stella, meets Nyx Ulric in front of the aquarium with the painting of Etro. Nyx gives her a hair clip as a present. After Nyx leaves, Lunafreya talks with General Glauca who doesn't think the peace will last.

Etymology
"Lucis Caelum" is the name of the kingdom's royal lineage.