The Supreme Court
This is the entrance to the Supreme Court of the United Kingdom which I visited in the summer. It replaced, from 2009, the House of Lords' judicial function. Every country has such a court, unless it's a dictatorship. When constitutional problems arise, the judges will interpret the law. They cannot change the law, nor pass new ones, only interpret existing ones. They also hear appeals from lesser courts when some point of law is disputed. We need such courts because human laws are not always clear and lesser courts make mistakes.
“As I live, says the Lord, every knee shall bow to me, and every tongue shall confess to God.”