This Training Resources document is designed to support European legal practitioners in deepening their understanding of and strengthening their capacity to engage with the Charter of Fundamental Rights of the European Union (Charter) in both domestic and European litigation. It combines theoretical insight with practical guidance on how to mobilize the Charter in legal proceedings, with a particular focus on its strategic use in defending fundamental rights and the rule of law. The aim is to equip legal professionals to identify, litigate and ultimately remedy (potential) violations of fundamental rights through strategic litigation that seeks to achieve systemic change. To enhance the practical dimension, the Annex of this material includes a case law database featuring examples from four EU Member States — Hungary, Poland, Belgium and the Netherlands —, each selected to illustrate how the Charter can be mobilized in litigation around a specific fundamental rights issue.