It's a road map from the Supreme Court on where the Ten Commandments can be displayed. In a pair of decisions, the court said it's ok to display the tablets outside courthouses and other public property, but it's not always ok to display them inside.
The first case involved two framed displays in Kentucky. The court ruled they have to come down, since they have a, quote, "predominantly religious purpose" and crossed the line between church and state, but the high court said that if an inside display honors the nation's legal history, like the frieze inside its own courtroom, then it's ok.
The second case involved exhibits on the grounds of government property. It was another 5-4 ruling, with Justice Sandra Day O'Connor as the swing vote.
The court said because the monument outside the Texas Capitol was one of 17 historical displays it's a legitimate tribute to the nation's history and not solely designed to send a religious message
Greg Abbott, Texas Attorney General, says, “This is an outstanding victory not just for Texas, but it's also an outstanding victory for all Americans.”
Jennifer Donelan says, “These were the courts’ first major ruling on the Ten Commandments since 1980 when it struck down a Kentucky law requiring them in public schools.”