Moshe Feinstein was a Lithuanian

Lithuanian Jews

Lithuanian Jews or Litvaks are Jews with roots in the Grand Duchy of Lithuania:...

 Orthodox

Orthodox Judaism

Orthodox Judaism , is the approach to Judaism which adheres to the traditional interpretation and application of the laws and ethics of the Torah as legislated in the Talmudic texts by the Sanhedrin and subsequently developed and applied by the later authorities known as the Gaonim, Rishonim, and...

 rabbi

Rabbi

In Judaism, a rabbi is a teacher of Torah. This title derives from the Hebrew word רבי , meaning "My Master" , which is the way a student would address a master of Torah...

, scholar and posek

Posek

Posek is the term in Jewish law for "decider"—a legal scholar who decides the Halakha in cases of law where previous authorities are inconclusive or in those situations where no halakhic precedent exists....

 (an authoritative adjudicator of questions related to Jewish law

Halakha

Halakha — also transliterated Halocho , or Halacha — is the collective body of Jewish law, including biblical law and later talmudic and rabbinic law, as well as customs and traditions.Judaism classically draws no distinction in its laws between religious and ostensibly non-religious life; Jewish...

), who was world-renowned for his expertise in Halakha

Halakha

Halakha — also transliterated Halocho , or Halacha — is the collective body of Jewish law, including biblical law and later talmudic and rabbinic law, as well as customs and traditions.Judaism classically draws no distinction in its laws between religious and ostensibly non-religious life; Jewish...

 and was regarded by many as the de facto supreme halakhic authority for Orthodox Jewry of North America during his lifetime. In the Orthodox world he is widely referred to simply as "Reb Moshe", and his halakhic rulings are widely quoted in contemporary rabbinic literature.
Feinstein was born, according to the Hebrew calendar

Hebrew calendar

The Hebrew calendar , or Jewish calendar, is a lunisolar calendar used today predominantly for Jewish religious observances. It determines the dates for Jewish holidays and the appropriate public reading of Torah portions, yahrzeits , and daily Psalm reading, among many ceremonial uses...

, on the 7th day of Adar

Adar

Adar is the sixth month of the civil year and the twelfth month of the ecclesiastical year on the Hebrew calendar. It is a winter month of 29 days...

, 5655 (traditionally the date of birth of the Biblical Moshe

Moses

Moses was, according to the Hebrew Bible and Qur'an, a religious leader, lawgiver and prophet, to whom the authorship of the Torah is traditionally attributed...

) in Uzda

Uzda

Uzda -History:The town was first mentioned in 1450. From 1938 it had the status of "urban-type settlement" and received its town status in 1999.-Geography:...

, near Minsk

Minsk

- Ecological situation :The ecological situation is monitored by Republican Center of Radioactive and Environmental Control .During 2003–2008 the overall weight of contaminants increased from 186,000 to 247,400 tons. The change of gas as industrial fuel to mazut for financial reasons has worsened...

, Belarus, then part of the Russian empire

Russian Empire

The Russian Empire was a state that existed from 1721 until the Russian Revolution of 1917. It was the successor to the Tsardom of Russia and the predecessor of the Soviet Union...

 to his father Rabbi David Feinstein, rabbi of Uzdan.