Who invented the Yahrtzeit tablet (panel)? At first glance, this could not have been common before 150 years ago, as there is no room to place candles where the electric lights go. Who invented ...
We refer to Moshe as "Moshe Rabbeinu". (It's interesting about the avos as well that we say, for example, Avraham Avinu; however, I'll keep that for a separate question.) When was the first time (and ...