The International Conference “Closed cycles and the Circular Society 2023: The power of ecological engineering” of the International Ecological Engineering Society (IEES) took place between October 1st – 5th, 2023 in Platanias – Chania on the island of Crete, Greece with physical presence which was organised by the Laboratory of Environmental Engineering and Management of the Technical University of Crete. The aim of the conference was to deliver and spread the message of redefining the ecological engineering discipline and communicate the IEES’s vision of an ecology inspired by circular engineering. The ‘’TANGO Circular’’ project was presented on the 3rd day of the conference at the presence of many important actors, such as educational and research institutes, public and private bodies, agronomists, chemical and environmental engineers.