Ltd., a consortium of three partners: LOT (Polish Airlines), ILBAU GmbH (an Austrian construction company), and the hotel chain Marriott International.

There is a proposal for a 71-storey tower, Lilium, to be built on the site currently occupied by the lower western wing of the building.

[5] In 1989, the Warsaw Marriott Hotel was opened in the building and occupied floors 20 and above, offering 518 rooms and 95 suites.

Warsaw Marriott Hotel guests have at their disposal a sauna, swimming pool, conference facilities, restaurants, and two bars.

Bush, Bill Clinton, Barack Obama,[6] George W. Bush and Joe Biden,[7] Michael Jackson, Luciano Pavarotti,[8] Madeleine Albright, Colin Powell, Al Gore, Helmut Kohl, King Juan Carlos I, Kamala Harris, and Aerosmith.