Princess Maria Madeleine Radziwiłł (born Marie-Eve-Madeleine-Josephus-Elizabeth-Apollonia-Catherine Zawisza-Kierżgajło; 1861 Warsaw – 1945 Fribourg) was a Polish–Belarusian aristocrat who financed many Catholic works and Belarusian national renaissance.

She was the daughter of Count Jan Kazimierz Zawisza-Kierżgajło [be] and the Countess Marie Kwilecka, former lady-in-waiting to the Russian Empress and great-granddaughter of King Stanisław August Poniatowski.

He was dedicated to the management of the property which included an immense forest of pines and oaks of 27,000 dessiatines (73,000 acres).

[2] She financed a Belarusian newspaper, Biełarus, the publishing house Zahlanie sonce i ŭ naše vakonce [be], a society to fight against alcoholism, a school of the village of Kuchcičy.

Radziwiłł also helped charitable works like the convent of Druya with their high school which was opened by the Marianists of the Immaculate Conception in 1923; had a seminary built in Vilnius and donated to the construction of the St Casimir's Lithuanian Church in London.

After the war, she financed the seminary for the Belarusian Greek Catholic Church in Rome and members of the "Lithuanian Renaissance".