Madonna has revealed that she is studying the Holy Quran these days.

The 55-year-old popstar said in an interview with Harper's Magazine that she is building schools for girls in Islamic countries.

The '4 Minutes' hitmaker said that she thinks it is important to study all the holy books.

Madonna added that she agrees with what one of her friends tell her, that a good Muslim is a good Jew, a good Jew is a good Christian, and so forth.

She had earlier revealed in the interview that she suffered a horrific rape at knifepoint when she first arrived in New York to pursue her career.