On the History and Development of Nirtza
Yaacov Sasson is a musmach of RIETS, and author of the recently published ספר שש אנכי, available here. Nirtza is the conclusion of the seder, and as most commonly recited in the Ashkenazi tradition, consists of the following components: the recitation of L’shana Habaa B’Yerushalayim and Chasal Sidur Pesach, followed by the piyutim Vayehi Bachatzi Halayla, Va’amartem Zevach Pesach, Ki Lo Naeh, Adir Hu, and then additional piyyutim such as Chad Gadya and Echad Mi Yodea; the latter two are…