The pottery shards that Hadrian used are described in detail. Since they have wine absorbed in them for the purpose of drinking, it is forbidden to derive benefit from them. But is one allowed to derive benefit from them if the benefit has nothing to do with the wine inside them, i.e. like using them for placing under the legs of a bed to make it even. In the context of that discussion, a braita is brought which included halachot about using a leather flask of a non-Jew and halachot relating to that issue are discussed. What are the details necessary to forbid a cut in the skin of an animal near the heart (when can one assume that it was done to remove the heart as an offering to their idols)? What are the halachot about animals on their way in/out of a house of idol worship? What about doing business with non-Jews on their way in/out of a house of worship? What about doing business with Jews on their way in/out of a house of worship?