From 1914, Kalideru's job at the crown domains went to Barbu Știrbey. A museum bearing Ioan and Nicolae's names, containing their respective art collections, opened the same year. The first private art museum in the country, it suffered damages during World War I: its Romanian-art section was evacuated during the battle of Bucharest, then confiscated by Bolshevik Russia. Kalinderu's park at Schitu-Greci was vandalized during the war and, by 1934, had still not been repaired.