It appears the Qatar-based ARTIC is handing the management of their owned Maritim Hotel Berlin to Marriott. The 505-room hotel will undergo a phased renovation over the next four years, and will debut in 2022 as JW Marriott Berlin.

This article gives a hair more color on the areas to be impacted by renovation:

"The extensive renovation of the hotel includes the exterior and entrance area, the public areas and facilities as well as the guest rooms and suites, which are to be completely redesigned. The extensive conference area, which currently comprises 5,500 square meters and two ballrooms, will also be completely renovated."

khabah