This document provides an introduction and overview of the Europeana Cloud project. The project aims to rethink how Europeana aggregates metadata from different institutions in a way that is more sustainable and cost-effective. It will involve 20 content providers, 3 aggregators, and 12 technical/strategic partners working together on building a shared technical infrastructure for ingesting and storing metadata and content. The goals are to investigate potential efficiencies around sub-aggregation, shared storage, and enriched data while establishing consensus on principles and a legal framework. The project will also explore building end-user services and tools on top of this infrastructure to support researchers. It consists of 7 work packages focused on different aspects of the project carried out by 35 partner institutions.