Enterprise systems and architectures are a field of significant research, especially in regard to service-oriented architectures and web services. Web services propose great benefits and are often suggested as the new paradigm for building distributed applications and systems, but they are becoming more and more complex and consequently less understandable for humans. The web development community on the other side widely backs the resource-oriented paradigm of REpresentational State Transfer (REST). While REST has been one of the success factors of the World Wide Web, it has not been taken into deeper consideration for enterprise architectures yet. This paper presents a new system architecture which is based on the primitives of REST and a layered architectural concept, which offers a unified interface, integrates type definitions of available resources, allows all CRUD-operations on secured disparate sources and could be and has been used for enterprise system integration purposes.