Career
He was a professor of the Jagiellonian University (since 1873), rector in 1890/1891. He participated in January Uprising (1863–1864). Zakrzewski was researching Polish politics of 16th century.
He was an initiator of modern studies about Reformation in Poland.
His notable works includes Powstanie i wzrost reformacji w Polsce 1520–1572 (1870), "Po ucieczce Henryka: dzieje bezkrolewia", Stefan Batory. (1887), Historia powszechna (volume 1–3.
1899–1903). He was also an initiator of publication Stanislai Hosii epistolae, orationes, legationes (volume 1–2.
In: Acta historica res gestas Poloniae illustrantia. 1879–1888).
