CAELUM places university libraries in the forefront of crisis response through open science, supporting vulnerable communities and bolstering EU-UA cooperation. The project also aims to: Sp. Obj 1: Upskill university libraries’ staff in innovative and interdisciplinary approaches to crisis response through EU-Ukraine HEIs collaboration. Sp. Obj 2: Promote and sustain university libraries-driven open knowledge and civic engagement among HE students and staff for crisis response.