By Nate Raymond 

NEW YORK, Jan 2 (Reuters) - The 2nd U.S. Circuit Court of Appeals is moving back to the Thurgood Marshall U.S. Courthouse on Monday following six-year renovation.

The historic courthouse closed in November 2006. Since then, the appeals court has heard arguments in the neighboring Daniel Patrick Moynihan U.S. Courthouse.

Opened in 1936, the 718,180-square-foot courthouse was designed by the same architect, Cass Gilbert, behind the U.S. Supreme Court Building that was opened in 1935.

Until the renovation, the court was home to the 2nd Circuit and also was the venue for some high-profile federal trials. The building was the site of the espionage trial of Ethel and Julius Rosenberg in 1951 and Martha Stewart's obstruction of justice trial in 2004.

Oral arguments before the 2nd Circuit set for Monday will give the public its first chance to see the courtrooms restored to their original appearance, Chief Judge Dennis Jacobs said in a statement.

"We expect that the work done will serve for many decades," he said.

The renovation addressed various electrical and mechanical problems. All but two judges on the 2nd Circuit will now have chambers in the Thurgood Marshall building.

Nine district judges and two magistrates are also expected to move to the renovated courthouse by March.

Judges had a choice of whether to move based on seniority. Most of those moving to the newly renovated building are recent appointees.

Making the move are U.S. District Judges Ronnie Abrams, Andrew Carter, Paul Engelmayer, Jesse Furman, Paul Gardephe, Alison Nathan, James Oetken, Lorna Schofield and Richard Sullivan.

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