"Av harachamim" is a prayer asking God to recall those who died al kidush hashem. It was written in response to the First Crusade (and is thus said only in the Ashk'nazi rite). Because of its somber ...
Those who have the custom to say the Yotzros for Musaf on Shabbos Shekalim finish off each stanza with the following words: אור פניך עלינו אדון נשא, ושקל אשא בבית נכון ונשא Hey, wait a second, ...
Can a Sefardi be Yotzeh Zachor with an Ashkenazi Laining and vice Versa?