The aim of this thesis is to create a GIS (Geographic Information systems) tool employing current technology to provide a geographic computer interactive and user friendly tool that will help students to learn more about Turkey from the crusades until the end of the growth of the Ottoman Empire. The time period covered is roughly from 1000AD to 1300AD. This GIS tool has been developed in core JAVA. MOJO (Map Objects Java Edition) is used for showing the layers of the map. Each Crusade, and the geographical boundaries for each Ottoman sultan were established as a layer on the map. The layers created are point layers or polygon layers or line layers. Users have the ability to customize the tool to suit their individual interests, select layers of their choice and click. By using this GIS tool, the user can click on various points which might represent battles located on the map; this will display a webpage for that point giving detailed information about that battle, as to how it started, where it happened, the casualties in the battle from both sides, who won and background information about the belligerents involved in those battles. There is also a 'family tree' of Turkish rulers, and by clicking on a ruler, one gets a Wiki biography about that ruler.