The Twenty-First International Conference on Intelligent Environments (IE 2025): A Report

Intelligent Environments are populated with numerous devices and have multiple occupants. They inherently exhibit increasingly intelligent behavior, support consistent functionality and human-centric operation (humans, as opposed to mere users, have increased requirements from a system, including, for example, intuitive interaction, protection of privacy, fault-tolerance, etc.), and provide optimized resource usage. The development of Intelligent Environments is considered the first and primary step towards the realization of the Ambient Intelligence vision and requires input from research and contributions from several scientific and engineering disciplines, including computer science, software engineering, artificial intelligence, architecture, social sciences, art and design. The series of IE conferences has been consistently creating a unique blend of researchers in these disciplines, fostering cross-disciplinary discussions, debate and collaborations. The 21st International Conference on Intelligent Environments was held on June 23–26, 2025, in Darmstadt (Germany).