Meir Simcha of Dvinsk (1843–1926) was a rabbi and prominent leader of Orthodox Judaism in Eastern Europe in the early 20th century. He was a kohen, and is therefore often referred to as Meir Simcha ha-Kohen ("Meir Simcha the Kohen"). He is known for his writings on Maimonides' Mishneh Torah, which he titled Ohr Somayach, as well as his novellae on the Torah, titled Meshech Chochma. Biography Meir Simcha was born in Butrimonys (), Lithuania, to Samson Kalonymus, a local wealthy merchant. According to family tradition, his later success in Torah study was attributed to two blessings his parents had received from local rabbis before his birth. He received his education locally, and managed to evade the regular roundups of Jewish boys that were being held as a result of the Cantonist decrees that had been in effect since 1827. After marrying in 1860, at age 17, he settled in Białystok, Poland, where he was supported by his wife, who opened a business to support him while he continued his Talmudic studies. After 27 years there he finally, after turning down many offers, accepted the rabbinate of the mitnagdim (non-Hasidic Jews) in the Latvian town of Dvinsk, now known as Daugavpils. He served in that position for 39 years until his death. In Dvinsk, his counterpart was the Hasidic Rabbi Yosef Rosen, known as the Rogatchover Gaon or by his work Tzofnath Paneach. The two had a great respect for each other, despite Rosen's legendary fiery temper, and on occasions referred questions in Jewish law to each other. They also shared a love for the works of Maimonides. In 1906, a certain Shlomo Friedlander claimed to have discovered and then published two tractates of the Jerusalem Talmud that had been considered to have been lost for hundreds of years. Rabbi Meir Simcha (as well as the Rogatchover Gaon, the Gerer Rebbe, Rabbi Moshe Shmuel Glasner of Klausenburg, the Dor Revi'i, and Rabbi Dr Yissachar Dov Ritter of Rotterdam) was one of the prominent rabbis who discovered that the work was a very clever forgery, and denounced it as such. In Dvinsk, he received visitors from the whole region, and was frequently consulted on issues affecting the community at large, including Poland and Lithuania. He reputedly turned down offers for the rabbinate in various large cities, including Jerusalem, New York City and Kovno. He died in a hotel in Riga while