Lopasnya
Lopasnya takes its name from the river that flows east to the Oka, through a district once contested by neighbouring Rus' princes. The name appears in a twelfth-century chronicle, though the precise site of the early centre is uncertain. In the fourteenth century Ivan Kalita included Lopasnya among the lands he left to his son Andrew. Agreements between Moscow and Ryazan later dealt with lands on either side of the Oka, reflecting the area's position on their changing frontier.