From the findlaw article:

"Article III, Section 1 of the Constitution provides that "[t]he judicial Power of the United States, shall be vested in one Supreme Court, and in such inferior Courts as the Congress may from time to time ordain and establish."

Under this section and the Judiciary Act of 1789, the United States Supreme Court was created. The Act organized the Supreme Court, the federal circuit courts and the federal district courts, established the Office of the Attorney General, and reserved the president's right to nominate justices for appointment to the United States Supreme Court with the advice and consent of the Senate."