 During the Peace Treaty Conference of that year, Urechia was secretary of a Romanian Bureau which popularized the unionist cause among the participants, and proposed a Romanian state under a foreign ruler, whom Urechia wanted to be of "Latin" origin.In August 1857, he married the upper-class Spanish woman Francisca Dominica de Plano, whose father had been the personal physician of Queen regent Isabella II.The wedding at the Romanian Orthodox Chapel in Paris.