In what battle did the most decorated soldier of the Civil War soldier die in and where was he finally buried?

Patrick Henry O'Rorke was the Union Army’s most decorated soldier of the Civil War.
He died July 2, 1863 at the Battle of Gettysburg from a gunshot wound to the neck.

He was originally buried at Pinnacle Hill Cemetery. Once it was closed he was moved to Holy Sepulcher Cemetery in Rochester New York.

sorry Koz, this soldier is also of the union and more highly decorated.

The man your looking for is Thomas Custer,little brother of George Custer. Died at the Battle of Little Big Horn, with his brothers and is buried at Fort Leavenworth,Kansas.

Sagus, you got another one. Thomas Custer was awarded two Medals of Honor during the civil war, both while he was acting as a color bearer.