Judgment of the Court (Grand Chamber) of 15 July 2021.#IX v WABE eV and MH Müller Handels GmbH v MJ.#Requests for a preliminary ruling from the Arbeitsgericht Hamburg and Bundesarbeitsgericht.#Reference for a preliminary ruling – Social policy – Directive 2000/78/EC – Equal treatment in employment and occupation – Prohibition of discrimination on the grounds of religion or belief – Internal rule of a private undertaking prohibiting the wearing of any visible political, philosophical or religious sign or the wearing of conspicuous, large-sized political, philosophical or religious signs in the workplace – Direct or indirect discrimination – Proportionality – Balancing the freedom of religion and other fundamental rights – Legitimacy of the policy of neutrality adopted by the employer – Need to establish economic loss suffered by the employer.#Joined Cases C-804/18 and C-341/19.