1963, Marco Grotenstein (in Hebrew Mordechai)was born in Sao Paulo in a traditional but non- religious Jewish family

1970 The family moves to England to work as a medical researcher in the field of physiology and the children attend a Jewish school

1973 The family returns to Brazil for family reasons and for two years studied at the American College of Morumbi

1976-1977 The children return to England to study at a Jewish religious boarding school and from there I became interested and liked authentic Judaism

1978-1979 the children return to Brazil and study at the Peretz school which was founded by our grandfather

1979 in December, by choice of mine, I participated in the summer camp at Yeshiva in Petrópolis, from where I returned as a practitioner

1980, attending the 3rd high school, already assumed Judaism in its entirety, I attended synagogues and had classes

1981 I entered 5th place in medicine at USP

1982 I dropped out college to devote myself to the religious studies I didn’t have as a child and went to a Yeshiva in the United States

1983-1984 studied in the United States and Canada at yeshiva

In 1985 I married my wife Daniela and after seven days of the wedding party I went to live in Israel and study at Kollel which is a Talmudic academy for married people.

1985-1991 I continued my studies and took exams at the Chief Rabbinate of Israel and became a rabbi

1991-1999 I continued studying to become a rabbinical judge by the chief rabbinate and in 1999 I graduated

2000-2002 I was responsible for the studies of judge at the institution where I graduated

2002-2022 at the end of 2002 we had to return to Brazil and I served as a rabbinical professor in several institutions and acted as a judge in the court of religious divorces and matters of Jewish law pertaining to marriages. And I continue to work on these matters related to Halacha.