Head of Poland's National Library, Tomasz Makowski, shows one of the many letters from Pope John Paul II to a Polish-America philosopher, Anna-Teresa Tymieniecka, that are kept at the library in Warsaw, Poland, Tuesday, Feb. 16, 2016. The library bought hundreds of letters for a "seven-digit" amount in 2008 from the woman, the Polish-born American thinker Anna-Teresa Tymieniecka, and is planning to have them published in the coming years. (AP Photo/Czarek Sokolowski)

One of hundreds of letters that Polish Cardinal Karol Wojtyla, later Pope John Paul II sent to a Polish-American philosopher during the 32 years of joint work and friendship between the two, now kept at the National Library in Warsaw, Poland, on Tuesday, 16 Feb. 2016. The library bought hundreds of letters for a "seven-digit" amount in 2008 from the woman, the Polish-born American thinker Anna-Teresa Tymieniecka, and is planning to have them published in the coming years. (AP Photo/Czarek Sokolowski)

Picture taken on February 16, 2016 shows a card written by Pope John Paul II on July 17, 1999 to Professor Anna-Teresa Tymieniecka with greetings to her husband and three children. The director of Poland's national library dismissed a BBC report alleging that pope John Paul II had a close relationship with a married woman lasting 30 years as a "Valentine's Day joke." / AFP / JANEK SKARZYNSKI

Picture taken on February 16, 2016 in Warsaw shows a letter written in1976 by Cardinal Karol Wojtyla, later Pope John Paul II, to Professor Anna-Teresa Tymieniecka. The director of Poland's national library dismissed a BBC report alleging that pope John Paul II had a close relationship with a married woman lasting 30 years as a "Valentine's Day joke." / AFP / JANEK SKARZYNSKI

Picture taken on February 16, 2016 in Warsaw shows the front of a card written by Pope John Paul II on July 17, 1999 to Professor Anna-Teresa Tymieniecka with greetings to her husband and three children. The director of Poland's national library dismissed a BBC report alleging that pope John Paul II had a close relationship with a married woman lasting 30 years as a "Valentine's Day joke." / AFP / JANEK SKARZYNSKI