Titiens : Her Majesty's prima donna, 2005 t.p. (Therese Titiens (Tietjens)) back cover (born in Hamburg 1831, died in London 1877)
Theater playbill for Theresa Titiens and the Strakosch Grand Italian Opera Company at National Theater, Washington, commencing April 3, 1876 playbill caption (M'lle Theresa Titiens)