What is associated with: a grand duchy with the name of this city was created by napoleon in 1807 to help restore the polish state?

Based on the clue 'a grain or seed of an ear of corn', what is the answer? What is referred to by 'a grammatical case nom'? What is associated with: a grand alliance was formed in 1689 against this sun king to enforce the treatys provisions? Based on the clue 'a grand champion of a tournament in this sport is ...', what is the answer? Based on the clue 'a grand hotel on whats now this citys pioneer cour...', what is the answer? Based on the clue 'a grand night for singing featured the songs of th...', what is the answer? Based on the clue 'a grand ole opry star says how deeeee when she joi...', what is the answer? What is referred to by 'a grand piano normally'?