This master thesis addresses the challenges associated with the management and presentation of immovable cultural heritage using the Arches open source platform. The existing inventories are mostly proprietary, expensive and extremely difficult to interconnect. The Arches platform comes to rescue with all of that. In my thesis, Arches has been employed to present the invention and development of early watercraft, and includes a database of all known logboats in the territory of Slovenia. The EarlyWatercraft.org application demonstrates the ability of the Arches platform to be employed in a wide range of uses; it can be applied for small-scale solutions but it can also be extended to accomodate large-scale (global) inventory requirements. The product presents early watercraft, which is a less known area of cultural heritage, to a wider audience using modern technologies and standards.