Title: Istorii︠a︡ teksta i i︠a︡zyka sluzhby kni︠a︡gine Olʹge
Subjects: Prayers and devotions, Liturgy, Liturgical language, Church Slavic, Russian, Liturgics, Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ, Orthodox Eastern Church, Russkai͡a pravoslavnai͡a t͡serkovʹ
Places: Russia
People: Olga Grand Duchess of Kiev, Saint (approximately 890-969)