With support from the New Levant Initiative and in collaboration with Axis Maps, the Historical GIS public platform levantCarta is an online environment where vector, spatial, and raster data are simultaneously streamed in, probed, toggled, viewed, or queried in a system that supports interconnected results from diverse data sources. Historians are able to visualize specific sites of inquiry, architects and urbanists can see proposed design projects in tempore et in loco, literary scholars can situate novels in a contemporaneous map, and, among others, archaeologists can peel away the layers of their complex stratigraphy. Scaled down into a mobile version, scholars, tourists, and residents alike are able to walk about town while visualizing Beirut, for example, as it once was and as it has been projected. Views by artists, maps by cartographers, as well as site plans by architects/urbanists are geo-temporally located, while their associated data get integrated in a browser. This includes a digital library of images, a geographic information system, an open-source relational database, and a content delivery web service. Such a mapping platform, therefore, qualifies as a time travel machine that showcases the urban evolution of levantine cities over their entire histories as well as across their social, cultural, and religious diversity. The project is also designed to bring together scholars who are now able to customize the online map so that they may visualize their own research, without having to rely on a GIS specialists. Scholars, or users who have been given permission to edit, have access to a geodata-editor, which allows them to make changes, additions, and corrections. The editor offers advanced geographic editing tools, such as snapping, cutting, splitting, clipping, and assisted rectangles. Once a user has made any edits, changes are then evaluated before they are published on the publicly accessible platform.