"To recover funds from Russia for the rent of the Ukrainian land, founded by Yury Dolgoruky, the prince of Kiev, who founded Muscovy, and they now use our Novgorod and our lands ... Count over 300 years," said the former Prosecutor General of Ukraine.
Piskun offered to take Russia "into slavery", if this rent is not paid.
Earlier, State Duma Speaker Vyacheslav Volodin instructed to oblige Kiev to compensate for the losses of the Crimea during his stay in Ukraine.
Crimea became the Russian region after the referendum held there in March 2014, in which the majority of residents spoke in favor of reunification with Russia.