Question: Petras Jonaitis Mantigirdaitis, was a prominent noble of the Grand Duchy of Lithuania. in 494, Mantigirdaitis was sent on the diplomatic mission to negotiate peace with the Grand Duchy of Moscow and marriage of Helena of Moscow to where?

Context paragraphs:
Helena of Moscow: Helena Ivanovna of Moscow (Russian: Елена Ивановна ; Lithuanian: "Elena" ; Polish: "Helena Moskiewska" ; 19 May 1476 – 20 January 1513) was daughter of Ivan III the Great, Grand Prince of Moscow, and an uncrowned Grand Duchess of Lithuania and Queen of Poland as she would not convert from Eastern Orthodoxy to Catholicism.  Her childless marriage to Grand Duke of Lithuania and later King of Poland Alexander Jagiellon was a constant source of tension between the Grand Duchy of Moscow and the Grand Duchy of Lithuania.  Instead of guaranteeing peace, Helena's marriage gave her father Ivan III an excuse to interfere in Lithuanian affairs accusing Alexander of mistreating Helena and repressing Orthodox believers.  This became the pretext to renew the Muscovite–Lithuanian War in 1500.  The war ended with a six-year truce in 1503; the Grand Duchy of Lithuania lost about a third of its territory.  Despite political tensions and religious differences, the marriage was a loving one and the royal couple was close.  After her husband's death in 1506, Helena wanted to return to Moscow but was not allowed.  When she planned to run away, she was arrested and reportedly poisoned.

Lithuanian Crusade: The Lithuanian Crusade was a series of campaigns by the Teutonic Order and the Livonian Order, two crusading military orders, to convert the pagan Grand Duchy of Lithuania into Roman Catholicism.  The Livonian Order settled in Riga in 1202 and the Teutonic Order arrived to Culmerland in 1230s.  They first conquered other neighboring Baltic tribes – Curonians, Semigallians, Latgalians, Selonians, Old Prussians (see Livonian Crusade and Prussian Crusade).  The first raid against the Lithuanians and Samogitians was in 1208 and the Orders played a key role in Lithuanian politics, but they were not a direct and immediate threat until 1280s.  By that time the Grand Duchy of Lithuania was already an established state and could offer organized defense.  Thus for the next hundred years the Knights organized annual destructive "reise" (raids) into the Samogitian and Lithuanian lands but without great success: border regions in Samogitia and Suvalkija became sparsely inhabited wilderness, but the Order gained very little territory.  The Grand Duchy finally converted to Christianity in 1386, when Grand Duke Jogaila accepted baptism from Poland before his wedding to reigning Queen Jadwiga and coronation as King of Poland.  However, the baptism did not stop the crusade as the Order publicly challenged sincerity of the conversion at the Papal court.  Lithuania, together with its new powerful ally Poland, defeated the Order in the decisive Battle of Grunwald in 1410, which is often cited as the end of the Lithuanian Crusade.  The final peace was reached by the Treaty of Melno (1422).

Metropolitanate of Lithuania: The Metropolitanate of Lithuania was a short-lived metropolitanate of the Orthodox Church in the 14th century.  Created between 1315 and 1317, it had only two metropolitans and was discontinued in 1371.  Its establishment was part of the entry of the Grand Duchy of Lithuania into the rivalry for the religious control of the Rus' principalities between Galicia–Volhynia, the Principality of Tver, and the Grand Duchy of Moscow.  The Byzantine Empire, seat of the Patriarch of Constantinople, generally preferred a united Metropolitanate of Kiev and all Rus' and was reluctant to divide its authority.  Therefore, whenever possible, the Byzantium would unite the metropolitanates.  Facing opposition to actual physical division of the metropolitanates, the Lithuanians employed additional tactics: promotion of their own candidates to the seat of the Metropolitan of Kiev and all Rus'.  By the 1440s however, the final years of the Byzantine Empire, the Grand Duchy of Moscow had effectively won the dispute and became the new spiritual center of the Orthodox tradition in Eastern Europe.

Petras Mantigirdaitis: Petras Mantigirdaitis (Polish: "Piotr Montygerdowicz" ; died 1459) was an influential noble of the Grand Duchy of Lithuania.  He was Grand Marshal of Lithuania (1434–59).

Michael Glinski: Michael Glinsky (Lithuanian: "Mykolas Glinskis" , Russian: Mikhail Lvovich Glinsky , Polish: "Michał Gliński" ; 1460s – 24 September 1534) was a noble from the Grand Duchy of Lithuania of distant Tatar extraction who was also a tutor of his nephew, Ivan the Terrible.  As a young man, Glinsky served in the court of Emperor Maximilian I and earned distinction for his military service.  Around 1498 he returned to Lithuania and quickly rose in power and wealth, angering local nobles.  Just after commanding the victorious Battle of Kletsk against the Crimean Khanate in August 1506, he was accused of conspiracy against the deceased Grand Duke Alexander Jagiellon and lost all his wealth.  Glinsky began an armed rebellion against Sigismund I, the new Grand Duke.  The rebellion was unsuccessful and Glinski retreated to the Grand Duchy of Moscow, where he served Vasili III of Russia.  When the Muscovite–Lithuanian Wars renewed in 1512, Glinsky was instrumental in helping Moscow to capture Smolensk, a major trading center.  However, he was not rewarded with the regency of the city.  Angered, he planned to betray Vasili III, but the plot was discovered and he was imprisoned for 12 years.  He was freed after his niece Elena Glinskaya married Vasili III in 1526.  Before his death in 1533, Vasili appointed Elena and Glinski as protectors of his underage sons Ivan and Yuri.  Elena disapproved of Glinsky's influence in the state and had him sent to prison, where he soon died of starvation.

Stanisław Kiszka: Stanisław Piotrowicz Kiszka (Lithuanian: "Stanislovas Kiška" ; died in 1513 or 1514) was a noble from the Grand Duchy of Lithuania.  He became the founder of the House of Kiszka.  He was sent on diplomatic missions to the Grand Duchy of Moscow and Kingdom of Poland.  During the Second Muscovite–Lithuanian War (1500–03), he successfully defended Smolensk and became Great Hetman (commander of the army).  Shortly before his death, Kiszka also became Grand Marshal of Lithuania.

Lithuanian Chronicles: The Lithuanian Chronicles (Lithuanian: "Lietuvos metraščiai" ), or Belarusian-Lithuanian Chronicles (Belarusian: Беларуска-літоўскія летапісы ; Russian: Белорусско-литовские летописи ) are three redactions of chronicles compiled in the Grand Duchy of Lithuania.  All redactions were written in the Ruthenian language and served the needs of Lithuanian patriotism.  The first edition, compiled in the 1420s, glorified Vytautas the Great and supported his side in power struggles.  The second redaction, prepared in the first half of the 16th century, started the myth of Lithuanian Roman origin: it gave a fanciful genealogy of Palemon, a noble from the Roman Empire who founded the Grand Duchy.  This noble origin of Lithuanians was important in cultural rivalry with the Kingdom of Poland.  The third redaction, known only from the Bychowiec Chronicle, elaborated even further on the legend, but also provided some useful information about the second half of the 15th century.  The three redactions, the first known historical accounts produced within the Grand Duchy, gave rise to the historiography of Lithuania.  All medieval historians used these accounts, that survived in 22 known transcriptions, as basis for their publications and some of the myths created in the chronicles persisted even to the beginning of the 20th century.

Lithuania proper: Lithuania proper (Latin: "Lithuania propria" , literally: "Genuine Lithuania"; Lithuanian: "Didžioji Lietuva" ; Yiddish: ליטע‎ , "Lite") refers to a region which existed within the Grand Duchy of Lithuania, and where the Lithuanian language was spoken.  The primary meaning is identical to the Duchy of Lithuania, a land around which the Grand Duchy of Lithuania evolved.  The territory can be traced by Catholic Christian parishes established in pagan Baltic lands of the Grand Duchy of Lithuania subsequent to the Christianization of Lithuania in 1387.  They were quite distinguishable, since Ruthenian parts of the Duchy have been already baptised in an orthodox manner.  The term in Latin was widely used during the Middle Ages and can be found in numerous historical maps until World War I.

Petras Jonaitis Mantigirdaitis: Petras Jonaitis Mantigirdaitis (died after 1497) was a prominent noble of the Grand Duchy of Lithuania.  Grandson of Petras Mantigirdaitis, he first appeared in written sources in 1476 and reached his career high in 1490s when he was Voivode of Trakai (1490–97) and Grand Marshal of Lithuania (1491–97).  Chronicler Marcin Bielski described that Alexander Jagiellon was crowned and blessed as the new Grand Duke of Lithuania by the Bishop of Vilnius in 1492.  Then Mantigirdaitis presented Alexander with a naked sword and a reminder that Alexander was elected to be a just ruler.  In 1494, Mantigirdaitis was sent on the diplomatic mission to negotiate peace with the Grand Duchy of Moscow and marriage of Helena of Moscow to Alexander to end the First Muscovite–Lithuanian War.  The Bychowiec Chronicle names him as a Great Hetman who recommended Konstantin Ostrogski, the first official Great Hetman, after his death.  Therefore, it is likely that at some point Mantigirdaitis was the commander of the Lithuanian army.

Krzysztof Radziwiłł's raid to Moscow: Krzysztof Radziwiłł raid on Moscow was a military raid on the Grand Duchy of Moscow led by Krzysztof Mikołaj "the Thunderbolt" Radziwiłł, Field Hetman of the Grand Duchy of Lithuania, during the final stages of the Livonian War (1558–1583).  The raid started in conjunction with the preparation for the Siege of Pskov.  It was a diversionary measure to protect the main Polish–Lithuanian forces at Pskov from a Russian attack.  Radziwiłł's cavalry raided deep into the Grand Duchy of Moscow, reaching Upper Volga.  That made the raid one of the most distant Lithuanian raids.  The raid was successful: Radziwiłł's men gained much loot, protected the main Polish–Lithuanian forces, and contributed to Tsar Ivan IV agreeing to negotiate the Truce of Jam Zapolski.

Supporting paragraphs: Petras Jonaitis Mantigirdaitis Helena of Moscow
Answer: Alexander