August Czartoryski was a Polish prince and Salesian priest who lived from 1858 to 1893. Born in Paris to an exiled noble family, he struggled with chronic illness, including tuberculosis, throughout his life. Although his father initially hoped he would pursue a diplomatic career, the prince chose the priesthood. Despite initial hesitation from Don Bosco regarding his fragile health, he joined the Salesians after receiving encouragement from Pope Leo XIII. He was ordained in 1892 and served as a pastor in Alassio before his early death.