Rabbi Shimon bar Yochai (Yohai), who flourished during the early second-century, is the traditional (but pseudepigraphic) author of the Zohar (cf. here, here, and here). For more on his traditional tomb in Meron, see here and links (cf. here). His Yahrzeit (death anniversary) is traditionally commemorated on Lag B'Omer. This year the festivities at Mount Meron were marred by a tragic accident.
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