Yechezkel ben Yehuda HaLevi Landau was an influential authority in halakha. He is best known for the work Noda Biyhudah, by which title he is also known.
lossy page 1 Noda Bi Y'hudah.tif
Jacob Emden, also known as the Yaʿavetz, was a leading German rabbi and talmudist who championed traditional Judaism in the face of the growing influence of the Sabbateans. He was widely acclaimed for
Yechezkel Landau
…In Brody, he was appointed dayan (rabbinical judge) in 1734. In 1745 Landau became rabbi of Yampol. While in Yampol, he attempted to mediate between Jacob Emden and Jonathan Eybeschütz in a debate—"The Emden-Eybeschütz Controversy"—that "had disrupted Jewish communal life for many years". Emden had accused…
Tombstone of Jacob Emden in Altona
Letter of Jacob Emden to the King of Denmark, August 20, 1743
Various works of Emden and his father. The two-volume set (first pair, left side) is the 1994 re-issue of the Shaarei ShaMaYim siddur.
Guide for the Perplexed by Maimonides