This project is regarding the Augmented reality, in which 3-D virtual objects are integrated into a 3-D real environment in real-time. This project describes the 3D AR of an Architecture building, the algorithm used here is called SLAM (Simultaneous localization and mapping), and marker-based augmented reality is the classification used. At events AR Can create a real-life experience and allow every user in the room to experience the same and see similar images, making it perfect for boosting the Client. The event industry is embracing this advanced technology to shape and change how we interact, attend, and market our businesses. In marketing augmented reality is used to increase sales strategies. It allows brands to give customers unique experiences by tapping into their mobile devices. AR visualization is a great way to display information to users.