As early as 1838, a London real estate agency used a device called the cosmorama to give wealthy buyers a glimpse of properties they might purchase. The cosmorama was an immersive visual tool that created a 3D effect by using a convex lens to magnify images, making them appear more lifelike and expansive. This technology, popular in the 19th century, can be seen as an early precursor to modern virtual tours, and it was eventually replaced by the stereoscope, a device that also used lenses to create a 3D effect but with photographic images. In 1838, during the coronation of Queen Victoria, the London real estate firm Brooks & Green began using the cosmorama to showcase properties. The device allowed viewers to look through a large convex lens at paintings or engravings, which were magnified and made to appear more three-dimensional. A darkened frame placed in front of the lens helped to hide the edges of the image, giving the illusion of looking into a vast scene. Clever lighting added to the sense of depth, making the experience more immersive. To use the cosmorama, an artist had to visit the property and create detailed sketches, which were then used to make the images. For two decades, Brooks & Green promoted its “cosmorama gallery,” offering potential buyers a detailed view of properties without the need to travel. This was long before photography became common in real estate marketing. The agency heavily advertised in London newspapers, with one 1842 ad claiming to show "several hundred views" of different properties. Each view included a top-down perspective, architectural details, and surrounding landscapes. While the cosmorama offered a more realistic experience than written brochures, it was accessible only to the wealthy. Only the most expensive estates could afford such detailed representation. Though admission to the gallery was technically free, it required a ticket, which was likely given only to those who appeared affluent. In the first half of the 19th century, the cosmorama was a popular visual spectacle across Europe and the Americas, often displayed in public spaces like fairs and science exhibitions. The name comes from Greek, meaning "views of the world," and it was used to showcase famous landscapes and buildings, such as the canals of Venice or the interior of St. Peter’s Basilica. The cosmorama was just one of several immersive visual technologies that captivated the public during the early 19th century. Others included optical boxes, panoramas, and dioramas, all of which gave audiences the illusion of travel without moving. These technologies were especially popular among the growing middle class, who had more leisure time and disposable income. The cosmorama eventually gave way to the stereoscope, which used photographic images to create 3D effects. The cosmorama thus marks an early chapter in humanity’s enduring fascination with immersive visual experiences, reflecting our desire to be transported beyond our immediate surroundings into new and imagined worlds.