1. The Ohr HaChaim was born in Morocco and was niftar at age 47 less than a year after moving to Jerusalem and was buried on the Mount of Olives called Har HaZeisim.
2. The Holy Ohr HaChaim was one of a few yzadikim called 'holy'. This small group includes the Alshich and the Shelah. The Baal Shem Tov said that the Ohr HaChaim was a spark from the soul of Moshiach
3. Many stories abound talking about the great miracles people experienced by praying at his grave. One famous story was of Rabbi Moshe Hillel Slezinger who didn't have children for many years. One of his doctors was so mean as to exclaim that when he grows hair on the palm of his hand he will have children. Tearfully Rabbi Hillel went to the Ohr HaChaim's tzion and promised to learn from his sefer every week. Within a year he had a daughter. He raised a generation of righteous children and one of his sons in law was Rav Moshe Halberstam a dayan and halachic authority in the Eidah HaCharedis.
4. In WWII when the threat of Germany entering the Holy Land was palpable, the Jerusalem rabbinical courts told the masses to go to the grave of the Ohr HaChaim to pray and beseech G-d for salvation. This group was headed by the Admorim (Hassidic rabbis) of Husyatin and Zhvil. After they finished saying the Tehilim at the kever they were both smiling. People asked why they were smiling and they answered that "the danger has passed; we are no longer in danger of the Nazis invading Israel." People asked; "how do you know?" One Rabbi said "I saw the 4 letter name of G-d properly written shining and hovering over the grave of the Ohr HaChaim so I understood the danger has passed." Indeed 2 days later, the Germans led by Rommel were routed at El Alamein by General Montgomery and they also suffered heavy losses on the Syrian front. The Russians opened a third front against Germany and they retreated from the region to regroup against the new threat. Miraculously the Jews in Israel were saved.
5. A spiritual remedy for having children is to accept upon yourself to learn from the Ohr HaChaim's commentary on a steady basis and in this way you will merit to have righteous boys that will learn Torah and keep mitzvoth. The admor 'Lev Simcha' of Gur said that the Ohr HaChaim had no children of his own so all of his strength to procreate is embedded in his holy commentary. That is why each portion of this holy book can bring fertility and righteous children.
6. Learning the Ohr HaChaim is a spiritual remedy for recovering from sickness, to strengthen your faith in G-d, wealth, a long life, fear of G-d and purity of the soul. In the book "Kiymu Vekiblu" it says that a person who learns the Ohr HaChaim's commentary on the Torah Portions of Acharei and Kedoshim is guaranteed not to leave this world without Teshuva and repentance.
7. The Baba Sali, Rabbi Yisrael AbuChatzeira would sit studying and complete the commentary of the Ohr HaChaim for that week's Torah portion every Friday.
8. The Ohr HaChaim passed away at the beginning of a Saturday night the 15th of Tammuz (Motzai Shabbat like this year). When he passed away the Baal Shem Tov in Mezhibuzh was washing his hands for the third meal as it was still day time in Mezhibuzh. He cryptically stated; "The Western candle was extinguished" (alluding to the western candle of the menorah). His talmidim asked him what he meant after Shabbat and the Baal Shem Tov explained that Rabbi Chaim Ben Attar, the holy Ohr HaChaim passed away. They asked him how he knew and he answered that there's a certain kavana - a mystical intention when making the beracha for washing the hands that is only revealed from the heavens to one person in the generation. When I washed my hands for the third meal this intention was revealed to me so I knew that the holy Ohr HaChaim passed away.
9. The grave or tzion of the Ohr Hachaim is considered a holy site: People visit it today on his Yohrzeit to pray there and they also visit there all year round to pray and daven for yeshuos and salvations.
based on https://www.hidabroot.com/
R' Tal Moshe Zwecker
Director Machon Be'er Mayim Chaim Publishing
Chassidic Classics in the English Language
in Israel: 972-2-992-1218 / Cell: 972-58-322-1218