Judgment of the General Court (Sixth Chamber) of 20 June 2019.#a&o hostel and hotel Berlin GmbH, successor in law to A & O Hotel and Hostel Friedrichshain GmbH v European Commission.#State aid — Operating aid — Youth hostel in Berlin — Rent-free use of a publicly owned property — Decision declaring the potential aid compatible with the internal market — Article 107(3)(c) TFEU — Serious difficulties.#Case T-578/17.