GOREE ISLAND, Senegal — Treasury Secretary Yellen paid a solemn visit Saturday to the salmon-colored house on an island off Senegal that is one of the most recognized symbols of the horrors of the Atlantic slave trade that trapped tens of millions of Africans in bondage for generations.

The visit comes amid growing calls on the left for reparations for slavery, including a California task force weighing $350,000 in compensation to descendants of slaves and a San Francisco city committee eyeing a $5 million payment. 

Ms. Yellen’s stop at the island is one that evoked the costs of the slave trade. There has been a resurgence in interest in determining the true cost of slavery on the generations impacted.

The House Financial Services Committee in recent years has studied how American banks and insurance companies profited from the practice of slavery before it was outlawed in 1865. 

There have also been hearings on the study and development of reparations proposals in America.

Ms. Yellen, in Senegal as part of a 10-day trip aimed at rebuilding economic relationships between America and Africa, stood in the Gorée Island building known as the House of Slaves and peered out of the Door of No Return, from which enslaved people were shipped across the Atlantic.

“Gorée and the trans-Atlantic slave trade are not just a part of African history. They are a part of American history as well,” Ms. Yellen said in brief remarks during her visit.

“We know that the tragedy did not stop with the generation of humans taken from here. Even after slavery was abolished, Black Americans — many of whom can trace their descendance through ports like this across Africa — were denied the rights and freedoms promised to them under our Constitution.”

The economic benefits that major slave-trading nations, including America, reaped for hundreds of years from unpaid labor could amount to tens of trillions of dollars, according to research on the commerce.

In America, African slaves and their children contributed to the building of the nation’s most storied institutions, including the White House and Capitol, according to the White House Historical Association.

Ms. Yellen acknowledged the ongoing ramifications of that brutal past. “In both Africa and the United States, even as we have made tremendous strides, we are still living with the brutal consequences of the trans-Atlantic slave trade,” she said.

“What I take from this place is the importance of redoubling our commitment to fight for our shared values and principles wherever they are threatened — in the United States, in Africa, and around the world,” the secretary said. “We have more work to do.”

Ms. Yellen’s trip to the island is one that many dignitaries have made, including Presidents Obama, Clinton, and  Mandela. Today, Gorée Island is designated as a UNESCO World Heritage Site.