Mobile devices, such as smartphones and tablet PCs, have become widely used modern-day information platforms. In this context, mobile devices can also serve as a convenient means of establishing interaction between historical sites and visitors, to enrich the cultural tourism offer. Providing precise multimedia-based information for a visitor at a historical location can be achieved by an augmented reality (AR) technology-based application on their mobile device. In this paper, we present an application based on AR technology aimed at providing information about historical events that took place on four specific years and which are inscribed on the four sides of the Monument to the Liberators located in the main square of the City of Niš, Serbia. By recognizing the reliefs at the bottom of the monument, each of which corresponds to an important event in the city’s decades-long struggle for liberty, the visitor can be immersed in a historical context through specially prepared multimedia content. The technical aspects of the implementation of the application and the on-site informing of visitors on its availability are also briefly discussed.