Sofer). In 1953, he founded his own Yeshiva in Katamon, Jerusalem, as well as the Institute for Research of the Teachings of the Chasam Sofer. The Institute researches and deciphers hand-written documents penned by the Chasam Sofer, his pupils, and descendants, and has printed hundreds of sefarim. Over the years, Rabbi Yochanan founded many synagogues, chederim, and kollelim, which he named after his ancestors. The Ezrat Torah Campus in Jerusalem is named Beth Chasam Sofer, as is the Erlau Synagogue in Haifa. The chederim are named Talmud Torah Ksav Sofer, after the Chasam Sofer's son; the kollelim and synagogues are named Yad Sofer, after Rabbi Yochanan's father; and the main yeshiva campus in Katamon is named Ohel Shimon MiErlau, after his grandfather. He has authored numerous Torah commentary works, naming them Imrei Sofer. The Erlau community is considered Hasidic style, though strictly follows Ashkenaz customs, as did the Chasam Sofer. It has branches in Jerusalem, Bnei Brak, Beitar Illit, El'ad, Haifa, Ashdod, and Boro Park (New York). The Pressburg Yeshiva of Jerusalem The Pressburg Yeshiva of Jerusalem () is a leading yeshiva located in the Givat Shaul neighborhood of Jerusalem, Israel. It was founded in 1950 by Rabbi Akiva Sofer (known as the Daas Sofer), a great-grandson of Rabbi Moses Sofer (the Chasam Sofer), who established the original Pressburg Yeshiva in the Austrian-Hungarian Empire in 1807. , the rosh yeshiva is Rabbi Simcha Bunim Sofer. The yeshiva building includes a Yeshiva Ketana, Yeshiva Gedolah, and kollel. The main beis medrash doubles as a synagogue where some neighborhood residents also pray on Shabbat. The complex also includes a general neighborhood synagogue which functions as Givat Shaul's main nusach Ashkenaz synagogue. Chasan Sofer Yeshiva, New York The Chassan Sofer Yeshiva in New York is considered the American yeshiva of the Chasam Sofer legacy. It was founded by Rabbi Shmuel Ehrenfeld, who was born and raised in Mattersdorf, Austria. His father, Simcha Bunim Ehrenfeld, the rabbi of Mattersdorf, whose father, Rabbi Shmuel Ehrenfeld (the Chasan Sofer), was a grandson of the Chasam Sofer. Rabbi Shmuel was rabbi of Mattersdorf from 1926 until 1938, when the congregation was dispersed by the Nazis. He escaped to America, and immediately re-established the Chasan Sofer Yeshiva in the Lower East Side, from where it was later relocated to Boro Park. After his death, he was succeeded by his son, Rabbi Simcha Bunim Ehrenfeld. The yeshiva currently enrolls