Rav Moshe Sofer, the Hatam Sofer was the leading Rabbinical authority of Central Europe in the 19th Century. His mastery of Halacha, commentary and Drush was unmatched in his time. As the expression goes "MeMoshe Ad Moshe Lo Kam KeMoshe". (From Moses to Moses, Maimonides, there was never another Moshe of their stature until Moshe Sofer). Machon Hatam Sofer publishes the works of Hatam Sofer himself and those of his sons and grandsons who continued in his way. These include the Drashot, the Responsa, Torat Moshe on Humash, The Hiddushim on the Talmud, and more.