In Orthodox and Conservative congregations, the Torah Ark remains closed while it is recited (except on Rosh Hashana and Yom Kippur, when the Ark is opened), but in some Reform congregations the Ark is opened whenever "Aleinu" is recited. In Sefardic congregations, as well as in the Askenazic traditions of Frankfurt and Mainz, "Aleinu" is not followed by the Mourner's Kaddish (because, variously, "Aleinu" was whispered to avoid antagonizing the Christian authorities, or because "Aleinu" is not a reading from Scripture), elsewhere it is.