[2] Exhibited at the Paris Exposition in 1900, the attraction was located inside a building in the amusement section, on the Champ de Mars, at the corner of Quai d'Orsay and avenue de Suffren.[3] The Mareorama simultaneously developed two panoramas in motion to the delight of the spectators, who placed themselves among them to create the illusion of being on the deck of a ship.
The two paintings were continuous images of the sea and shoreline from the trip. They were each 750 m (2,460.63 ft) long and 13 m (42.65 ft) tall.[3] To create them, d'Alesi sketched the highlights from a year-long trip he took between Villefranche and Constantinople.[4][5] He then directed a large team of decorative and scene painters for eight months, to transfer the sketches onto the 19,500 m² (around 210,000 square feet) of canvas.[5] Mounted on large cylinders supported by floats, and driven by hydraulic motors, the two canvases unrolled past the spectators over the course of the simulated journey. The upper edge of each canvas was hooked to small trolleys on a rail and reinforced with a thin steel band to prevent sagging. The cylinders themselves were concealed by curtains and props.
Spectators stood on a platform which represented the deck of a steamship, complete with smoking funnels and steam whistles. In order to give it a rolling and pitching motion, it was mounted on a 5 m (16 ft) square iron frame on a gimbal. A combination of hydraulic cylinders, chains, and electric motors allowed the platform to pitch by up to 50 cm (20 inches) from horizontal, and to roll by up to 20 cm (8 inches).
The realism of the attraction derives both from the theme they represent and from the technology that puts passengers in the middle of things and the simulated movement. There was even a Mareorama that lasted half an hour and accommodated seven hundred spectators at a time, which offered a plausible itinerary to several ports. Among these we find a simulated voyage from Villefranche to Constantinople, passing by Sousse, Naples, and Venice[3].It was a sensory journey both in time and space. Mareorama, in that way, turned the spectators into "passengers" of a ship, since it simulated the emotion of traveling by sea with moving images, by consisting of a 33 m (around 108 ft) long[3] replica of a steamship and 2 panoramas (one for the port side, one for the starboard) on large rollers.