sentences:  The two names "Russia" and "Moscovia" appear to have co-existed as interchangeable during the later 16th and throughout the 17th century with different Western maps and sources using different names, so that the country was called ""Russia, or Moscovia"" () or ""Russia, popularly known as Moscovia"" ().In England of the 16th century, it was known both as Russia and Muscovy.Such notable Englishmen as Giles Fletcher, author of the book "Of the Russe Common Wealth" (1591), and Samuel Collins, author of "The Present State of Russia" (1668), both of whom visited Russia, were familiar with the term "Russia" and used it in their works.