Russian Foreign Minister Sergey Lavrov will be paying a formal visit to Armenia April 3-4, RF Ambassador Nikolay Pavlov told reporters in Yerevan. In his words, the visit is dated to the 15th anniversary of establishment of diplomatic relations between Armenia and Russia and the 10th anniversary of signing of the Big Treaty on Cooperation. "During the visit the Russian FM will meet with RA President Robert Kocharian, Defense Minister and Co-chair of the Armenian-Russian intergovernmental commission Serge Sargsyan and Foreign Minister Vartan Oskanian. He will also give a lecture in the Yerevan State University," Pavlov said.