VortFinderChofetz Chaim
1838-1933
Rav Yisrael Meir Hakohen Kagan (1839-1933) lived in Radin, Poland. His sefer Mishna Berura is written as a commentary on the Shulchan Orach, Orach Chaim. It is considered one of the most important halakhic works, and is very commonly learned and followed. The sefer includes many expanded explanations of the halakha known as the Beiur Halakha, and notes for sources known as the Sha’ar Hatziyon. He wrote many other seforim, including a well-known work on the laws of lashon hara known as Chafetz Chaim. He travelled extensively to raise money for Yeshivot and to sell his seforim, speaking publicly throughout his journeys. A student collected and published his derashot as “Chofetz Chaim al HaTorah.”
HebrewBooks: https://www.hebrewbooks.org/38071