The Idra Rabba is a section of the Zohar inserted into Parshas Naso where Rabbi Shimon Bar Yochai gathers nine of his students to reveal Kabbalistic mysteries he had refrained from teaching until then. During the Idra three of the Sages passed away including Rabbi Yossi ben Yackov who was then buried at this location. It is called the 'Idra Rabba' or 'Greater Gathering' to differentiate it from the 'Idra Zuta' or 'Lesser Gathering' that took place on the day Rebbe Shimon passed away. Acourding to tradition the Idra Raba took place near the village of Kadita in Northern Israel.
 Members of the Idra
Members of the Idra were Rebbe Shimon bar Yochi, Rabbi Eliezer his son, Rabbi Abba, Rabbi Yehuda, Rabbi Yossi bar Yaakov, Rabbi Yitzchak, Rabbi Chezkiyah bar Rav, Rabbi Chiyya, Rabbi Yossi and Rabbi Yisa.
Rabbi Yossi bar Yaakov, Rabbi Chezkiyah bar Rav and Rabbi Yisa passed away during the Idra.
 Location of the Idra
 Kever Rabbi Yossi ben Yackov
Rabbi Yossi ben Yackov, one of the three Sages that passed away during the Idra was buried at the location of its revelation.