The millenary of that event was celebrated in 1862 at Novgorod, as the foundation of the Russian empire.
"The Great Events by Famous Historians, Volume 5" by Various
The fourth is the Jaik or Rhymnus, on each bank of which a millenary commands.
"A General History and Collection of Voyages and Travels, Vol. I" by Robert Kerr
Millenary Petition, the, 148.
"An Outline of the Relations between England and Scotland (500-1707)" by Robert S. Rait