 Complete the following phrase:  Because his father - Sergey Matveyev - was a notable diplomat, Artamon Matveyev was brought up at the royal court since the age of thirteen, where he would become close friends with Alexius I. Matveyev started his career as a government official, who worked in Ukraine and took part in some of Russias wars with Poland. He was a member of the Russian delegation at the conclusion of the Treaty of Pereyaslav in 1654 and Russian diplomatic mission to Poland in 1656-1657. As the head of the Streltsy Department, Matveyev participated in suppression of the 