Sukkot

If a sukkah is built so poorly that it is not possible to sleep in it, some authorities hold that it is not kosher and that one may not even eat in it. However, in practice, we do not follow this view, and such a sukkah is nonetheless kosher.

What Determines Whether One Observes a Second Day of Yom Tov?

An historical article on the Esrog difficulties of the past in the European Kehilos.