Later other famous artists also stayed here: Karol Szymanowski (one of the apartments is named after the great Polish composer), the piano virtuoso Artur Rubinstein and key literary figures such as Tadeusz Boy-Żeleński and film directors like Eugeniusz Bodo. The young French captain Charles de Gaulle also stayed here in the summers of 1919/1921 as an observer of the plebiscite in Silesia which saw it pass into the hands of Poland after WW1.
After WW2, and under the communist regime, fortune was not quite as favourable to the hotel. By the end of the 1940’s it had been transformed into offices, although the travel company Orbis maintained a restaurant and the ground floor was home to an antique shop and travel agents. In the mid 1980’s, the doors of the building were finally closed, seemingly forever.

Once again the great and the good are to be found in the Monopol. Recent guests include footballers David Beckham and Christiano Ronaldo, as well as rock stars such as Deep Purple and Phil Collins of Genesis fame. The hotel has also played host to the more traditional musicians, with the Monopol collaborating with the Narodową Orkiestrą Symfoniczną Polskiego Radia (the Polish Radio National Symphony Orchestra) and the Filharmonia Śląska (the Silesian Philharmonic).