Russian Federation Council Chair Valentina Matviyenko (C) participates in a ceremony to mark the 310th anniversary of the founding of St. Petersburg, in St. Petersburg, May 27, 2013. (Xinhua)

Russian soldiers lay wreath during a ceremony to mark the 310th anniversary of the founding of St. Petersburg, in St. Petersburg, May 27, 2013. (Xinhua)

Russian Federation Council Chair Valentina Matviyenko (C) participates in a ceremony to mark the 310th anniversary of the founding of St. Petersburg, in St. Petersburg, May 27, 2013. (Xinhua)