Rus'" (Царь и Великий князь всея Руси) and was crowned on 16 January, thereby proclaiming the Tsardom of Russia, or "the Great Russian Tsardom", as it was called in the coronation document, by Constantinople Patriarch Jeremiah II and in numerous official texts, but the state partly remained referred to as Moscovia () throughout Europe, predominantly in its Catholic part, though this Latin term was never used in Russia. 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. So did numerous other authors, including John Milton, who wrote A brief history of Moscovia and of other less-known countries lying eastward of Russia, published posthumously, starting it with the words: "The Empire of Moscovia, or as others call it, Russia...". In the Russian Tsardom, the word Russia replaced the old name Rus in official documents, though the names Rus and Russian land were still common and synonymous to it, and often appeared in the form Great Russia (), which is more typical of the 17th century, whereas the state was also known as Great-Russian Tsardom (). According to historians like Alexander Zimin and Anna Khoroshkevich, the continuous use of the term Moscovia was a result of traditional habit and the need to distinguish between the Muscovite and the Lithuanian part of the Rus', as well as of the political interests of the Polish–Lithuanian Commonwealth, which competed with Moscow for the western regions of the Rus'. Due to the propaganda of the Commonwealth, as well as of the Jesuits, the term Moscovia was used instead of Russia in many parts of Europe where prior to the reign of Peter the Great there was a lack of direct knowledge of the country. In Northern Europe and at the court of the Holy Roman Empire, however, the country was known under its own name, Russia or Rossia. Sigismund von