Oracle Autonomous Data Warehouse is a managed cloud data warehouse from Oracle that runs on Oracle Cloud Infrastructure (OCI) and is meant for analytics and reporting on large datasets. Oracle's release notes state that the Autonomous Database family has been renamed Autonomous AI Database and that Autonomous AI Lakehouse is the next generation of Autonomous Data Warehouse.
Oracle Corporation is headquartered in Austin, Texas, and is a US company, so US legislation such as the CLOUD Act can also apply to data stored in European regions. Customers choose an OCI region, including Frankfurt, Amsterdam, Paris, Madrid, Stockholm and Zurich, as well as London. Alongside its regular commercial regions, Oracle offers a separate EU Sovereign Cloud which, according to Oracle, is logically and physically separate and operated by EU residents. Whether the service is available in those regions has to be checked per region. The software is proprietary and not open source.