Judgment of the Court (Grand Chamber) of 22 December 2022.#Christian Louboutin v Amazon Europe Core Sàrl and Others.#Requests for a preliminary ruling from the Tribunal d'arrondissement de Luxembourg and Tribunal de l’entreprise francophone de Bruxelles.#Reference for a preliminary ruling – EU trade mark – Regulation (EU) 2017/1001 – Article 9(2)(a) – Rights conferred by an EU trade mark – Concept of ‘use’ – Operator of an online sales website incorporating an online marketplace – Advertisements published on that marketplace by third-party sellers using, in those advertisements, a sign which is identical with a trade mark of another person for goods which are identical with those for which that trade mark is registered – Perception of that sign as forming an integral part of the commercial communication of that operator – Method of presenting the advertisements which does not make it possible to distinguish clearly the offerings of that operator from those of the third-party sellers.#Joined Cases C-148/21 and C-184/21.