Aleksander Kakowski came from an aristocratic landowning family, studied at the University of Warsaw, in Saint Petersburg and Rome, the subjects Catholic theology and philosophy. After promotions in Catholic theology and canon law, he received on 30 May 1886, the sacrament of Holy Orders. From 1886 to 1911 he held various responsibilities in the Archdiocese of Warsaw, first as a parish priest, then as a canon in the diocesan curia. In addition, he conducted three years the seminary and knew the task of the censor for religious books. From 1910 to 1913 he headed the Theological College in St. Petersburg and taught the subject canon law. 1911, the honorary title of Pontifical domestic prelates, he was awarded. 1913 he was appointed by Pope Pius X. Archbishop of Warsaw. In the years 1917 and 1918 Aleksander Kakowski was one of the three members of the Regency Council of Regency Kingdom of Poland from 1916 and titular Primate of the Kingdom of Poland. Pope Benedict XV. took him in 1919 as a cardinal priest with the titular church of Sant'Agostino in the College of Cardinals to. 1935 by Cardinal Kakowski the funeral for Marshal Piłsudski. Beginning of the year 1938 he was elected Chancellor of the chapter to the Order of the White Eagle.
Aleksander Kakowski was buried in the Warsaw Bródno Cemetery.
- Zenon Pieta: Hierarchia Catholica Medii et Recientoris Aevi. Volume IX ( 1903-1922 ). Patavii: Typis et Sumptibus Domus Editorialis "Il Messaggero di Sant'Antonio " apud S. Basilicam Antonii, 2002