Teshuvot Bayit Chadash is a 17th-century collection of responsa penned by Rabbi Yoel Sirkis, also known as the Bach. Its letters often shed light on the social, economic, and religious conditions of Polish Jewry during the period, addressing cases like that in which a Jew was martyred by Christians for stealing a statue of Jesus. The responsa were published in two volumes: Teshuvot HaYeshanot (“Old Responsa”) address topics related to monetary law and forbidden mixtures, while Teshuvot HaChadashot (“New Responsa”) address assorted topics.