Rashi and Jacob Tam disagreed over whether this object should be (*) oriented horizontally or vertically, so it is usually set at a diagonal; it is also inset with the letter shin.
In one story, Hadrian's nephew Onkelos prevented some Roman guards from killing him by kissing one of these objects and explaining its meaning. This object displays a Caesar cipher such that, when each letter is replaced with the previous letter of the alphabet, it reads "The Lord, God, the Lord." A ritual involving this object is to touch it and then kiss the fingers one used to touch it. Among the Samaritans, this kind of object was a large stone slab. This object is often used in the Chanukat HaBayit ritual. Rashi and Jacob Tam disagreed over whether this object should be (*) oriented horizontally or vertically, so it is usually set at a diagonal; it is also inset with the letter shin. The text of the Shema, along with part of Deuteronomy 11, is written on a piece of parchment held in this type of object. For 10 points, name these scroll-containing items affixed to the doorposts of Jewish households.
In one story, Hadrian's nephew Onkelos prevented some Roman guards from killing him by kissing one of these objects and explaining its meaning.
mezuzah [or mezuzot]