President Donald Trump locked horns with Federal Reserve Chair Jerome Powell during a rare presidential visit to the U.S. central bank on Thursday, criticizing the cost of renovating two historical buildings at its headquarters and pressing the case for lower interest rates.

The president toured the Federal Reserve’s headquarters with its chair, as the administration intensifies its campaign against his handling of the economy and the multibillion-dollar project.

President Trump visited the central bank on Thursday, as the White House criticizes an extensive $2.5 billion renovation project to the buildings.