The Hall of Hewn Stones was the meeting place of the Sanhedrin

Sanhedrin

The Sanhedrin was an assembly of twenty-three judges appointed in every city in the Biblical Land of Israel.The Great Sanhedrin was the supreme court of ancient Israel made of 71 members...

 during the Second Temple

Second Temple

The Jewish Second Temple was an important shrine which stood on the Temple Mount in Jerusalem between 516 BCE and 70 CE. It replaced the First Temple which was destroyed in 586 BCE, when the Jewish nation was exiled to Babylon...

 period. The Talmud

Talmud

The Talmud is a central text of mainstream Judaism. It takes the form of a record of rabbinic discussions pertaining to Jewish law, ethics, philosophy, customs and history....

 deduces that it was built into the north wall of the Temple

Temple in Jerusalem

The Temple in Jerusalem or Holy Temple , refers to one of a series of structures which were historically located on the Temple Mount in the Old City of Jerusalem, the current site of the Dome of the Rock. Historically, these successive temples stood at this location and functioned as the centre of...

, half inside the sanctuary and half outside, with doors providing access both to the temple and to the outside. The name presumably arises to distinguish it from the buildings in the temple complex used for ritual purposes

Korban

The term offering as found in the Hebrew Bible in relation to the worship of Ancient Israel is mainly represented by the Hebrew noun korban whether for an animal or other offering...

, which had to be constructed of stones unhewn by any iron

Iron

Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element forming the planet Earth as a whole, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust...

 implements.

According to the Talmud

Talmud

The Talmud is a central text of mainstream Judaism. It takes the form of a record of rabbinic discussions pertaining to Jewish law, ethics, philosophy, customs and history....

, the Hall of Hewn Stones is the traditional meeting place of the Great Sanhedrin

Sanhedrin

The Sanhedrin was an assembly of twenty-three judges appointed in every city in the Biblical Land of Israel.The Great Sanhedrin was the supreme court of ancient Israel made of 71 members...

 when it functioned as a court with full sovereign powers including the power to impose criminal penalties.

It has been taught; R. Jose said; Originally there were not many disputes in Israel, but one Beth din of seventy-one members sat in the Hall of Hewn Stones, and two courts of twenty-three sat, one at the entrance of the Temple Mount and one at the door of the [Temple] Court, and other courts of twenty-three sat in all Jewish cities. If a matter of inquiry arose, the local Beth din was consulted. If they had a tradition [thereon] they stated it; if not, they went to the nearest Beth din. If they had a tradition thereon, they stated it, if not, they went to the Beth din situated at the entrance to the Temple Mount; if they had a tradition, they stated it; if not, they went to the one situated at the entrance of the Court, and he [who differed from his colleagues] declared, 'Thus have I expounded, and thus have my colleagues expounded; thus have I taught, and thus have they taught.' If they had a tradition thereon, they stated it, and if not, they all proceeded to the Hall of Hewn Stones, where they [i.e., the Great Sanhedrin] sat from the morning tamid until the evening talmid; on Sabbaths and festivals they sat within the hel.

The Sanhedrin stopped meeting in the Hall of Hewn Stones when the Roman Empire

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

restricted Judaea's autonomy and removed the Sanhedrin's power to impose criminal penalties.