Lithuanian–Muscovite War (1368–1372) fight. The episode with the spear was probably borrowed from Polish historiography: King Boleslaus I of Poland used his sword (Szczerbiec) to hit the Golden Gate in Kiev in 1018. Lithuanian–Muscovite War (1368–1372) The Lithuanian–Muscovite War encompasses three raids by Algirdas, Grand Duke of Lithuania, to the Grand Duchy of Moscow in 1368, 1370, and 1372. Algirdas organized the raids against Dmitry Donskoy in support of the Principality of Tver, chief rival of Moscow. In 1368 and 1370, Lithuanians besieged Moscow and burned the posad, but did not succeed in taking the city's Kremlin. In 1372, the Lithuanian army was
Muscovite muscovite comes from "Muscovy-glass", a name given to the mineral in Elizabethan England due to its use in medieval Russia as a cheaper alternative to glass in windows. This usage became widely known in England during the sixteenth century with its first mention appearing in letters by George Turberville, the secretary of England's ambassador to the Russian tsar Ivan the Terrible, in 1568. Muscovite Muscovite (also known as common mica, isinglass, or potash mica) is a hydrated phyllosilicate mineral of aluminium and potassium with formula KAl(AlSiO)(FOH), or (KF)(AlO)(SiO)(HO). It has a highly perfect basal cleavage yielding remarkably thin laminae (sheets)