U.S. President Barack Obama has made climate change legislation one of his top goals and has pushed for more clean, renewable energy like solar and wind power.

But back in 1979, when another Democrat was in the White House, 32 solar panels graced the roof above the Oval Office.

Part of an initiative called “Solar America,” the panels turned sunlight into electricity that heated water in the staff kitchen — which President Jimmy Carter often used. They were removed during Ronald Reagan’s administration in 1986.

Now, one of those presidential solar panels has joined the Smithsonian’s National Museum of American History in Washington, DC.

“The White House solar panel is evidence of an American president leading by example to promote his administration’s agenda,” Harry Rubenstein, chair of the museum’s division of politics and reform, said in a statement. “It displays how President Carter reinforced his policies through a personal gesture taking place in his own home.”