Julian Klaczko was a Polish author.

Born Jehuda Lejb into a wealthy Jewish family, he studied in Vilna and Königsberg

Königsberg

Königsberg was the capital of East Prussia from the Late Middle Ages until 1945 as well as the northernmost and easternmost German city with 286,666 inhabitants . Due to the multicultural society in and around the city, there are several local names for it...

. In 1847, he took PhD title (doctorate work De rebus Franco-Gallicis saeculi XV). Then he moved to Heidelberg, and published in liberal Deutsche Zeitung.

After failure of the Poznań uprising (1848), he emigrated to France. In Paris he changed his name and converted to Christianity

Christianity

Christianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...

 (1856). He was a co-editor of Wiadomości Polskie, and published in Revue de Paris, Revue Contemporaine, and Revue des Deux Mondes (since 1862).

Klaczko was a politician who co-operated with liberal-aristocratic the Hotel Lambert

Hôtel Lambert

Hôtel Lambert is a hôtel particulier, a grand mansion townhouse, on the Quai Anjou on the eastern tip of the Île Saint-Louis, Paris IVème; the name, Hôtel Lambert, was a sobriquet that designated a 19th-century political faction of Polish exiles, who gathered there.-Architectural history:The house...

 faction of Polish exiles (leader – prince Adam Jerzy Czartoryski

Adam Jerzy Czartoryski

Prince Adam Jerzy Czartoryski was a Polish-Lithuanian noble, statesman and author. He was the son of Prince Adam Kazimierz Czartoryski and Izabela Fleming....

). In 1870, he was elected Privy Cancillor at Foreign Affairs Ministry of Austria–Hungary. He was also a member of the Galician Parliament (1870-71).