Helena Apolonia Massalska  Princess Helena Apolonia Massalska (1763-1815), was a Polish noblewoman and diarist. She was daughter of Prince Jozef Adrian Massalski and Princess Antonina Radziwill. In 1779 she married Prince Charles-Joseph Antoine de Ligne and in 1792 Count Vincent Potocki. She is also known for her diary and her correspondence, which have been preserved and are regarded as an important source of contemporary life in Poland.