Descended from the lineage of intellectual boyars, Tadeusz Hâjdeu was a Romanian writer from Bessarabia, the son of the lawyer Tadeu Hâjdeu, and the father of the writer Bogdan Petriceicu Hasdeu. A philosopher, writer, academician, and fluent in 10 languages, including Persian, Hâjdeu made a significant contribution to the unification of the Romanian principalities. His speech in 1837 laid the cornerstone for the Unification of the Principalities (the Little Union) in 1859. Through his letter “Epistola către români” (Epistle to the Romanians), Hâjdeu defined the key element of “Romanian messianism,” also known as “the Bessarabian school,” demonstrating the intelligent participation of Bessarabians in the act of the Romanian nation’s unification. A street in Chisinau bears his name.