russischem

russischem

"Russischem" is the dative or attributive adjective form of "russisch," meaning "Russian" in English.

Here, 'russischem' is an adjectival form in the dative singular case modifying 'Kaiserreichs', describing the Empire as 'Russian' in a historical context.

Ich lese ein Buch über die Geschichte des russischem Kaiserreichs.

I am reading a book about the history of the Russian Empire.

In this sentence, 'russischem' acts as an adjective in dative singular, agreeing with 'Essen', referring to Russian food.

Mit russischem Essen bin ich vertraut.

I am familiar with Russian cuisine.

Here, 'russischem' describes 'Einflussgebiet' as influenced by Russian culture, again using the dative singular form.

Das Museum zeigt Kunst aus russischem Einflussgebiet.

The museum exhibits art from Russian-influenced regions.