The Pavilion that includes the tourist information centre for Celje first and foremost protects the archaeological remains (walls, frescoes, mosaics, and other architectural components) while also functioning as an archaeological exhibition titled "Celeia – a Mosaic of the Past". The exhibition, which is in the basement, includes a reconstructed mosaic that enables hands-on experiences.

The reconstructed archaeological remains of the Mithraeum are included into a cultural hub together with a contemporary art gallery and an educational area. The hub occupies a part of the Bloomberg building’s ground floor, also descending 7m below the modern ground level through a gallery, to reach the original Roman ground level where the remains are located.

The Alba Carolina Citadel is a star-shaped fortress with Vauban-style bastions built at the beginning of the 18th century at the site of a medieval fortress, which was itself constructed over the fort of the Roman legion XIII Gemina. The Citadel has the legal status of historical monument.