During this period, communities were able to connect because travel became more accesible and the invention of the printing press. Some key rabbanim are Rav Shlomo ben Yechiel Luria Rav Chaim Luzzato, and Rav Moshe Isserless. Rav Yosef Karo published the Shulchan Aruch, which became the book we reference the most with halachic decisions.