 Fraknói began studying Hungarian history at an early age.He published his first work in 1868, at the age of 25, about the life of Péter Pázmány – the greatest figure of Hungarian Counter-Reformation – in three volumes.He wrote about other famous Catholic personalities, like János Vitéz and Tamás Bakócz, the Renaissance archbishops of Esztergom, works written in 1879 and 1889.