Cyril and Methodius
Old Church Slavonic
Primary Chronicle/Tale of Bygone Years
Nestor
"trade route from the Varangians to the Greeks"
Dneiper River
podzol and chernozem
Byzantine Empire
Constantine and Constantinople
Vikings
Khazars
origins of "Rus"
Rurik (Riurik) (Рюрик)
Oleg
Igor
Olga
Sviatoslav
Vladimir I (St. Vladimir)
syncretic pantheon
Anna
988
dvoeverie
Iaroslav
Boris & Gleb
Russkaia pravda (short version; expanded version)
Metropolitan of Kiev
"Grand Prince" (velikii kniaz) (великий князь)
princes and principalities
Vladimir Monomakh (and his "Testament")
Mstislav Vladimirovich (i.e., Mstislav son of Vladimir)
Polovtsy/Polovtsians/Kuman/Kipchak
Lay of Igor's Campaign aka Igor Tale (Слово о полку Игореве)
(also, as opera)
Novgorod
veche
fortifications ("Snake Ramparts")